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README.md
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tags:
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- sentence-transformers
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- feature-extraction
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- sentence-similarity
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- transformers
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---
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This is a [sentence-transformers](https://www.SBERT.net) model: It maps sentences & paragraphs to a 1024 dimensional dense vector space and can be used for tasks like clustering or semantic search.
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```
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pip install -U sentence-transformers
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```
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Then you can use the model like this:
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```python
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from sentence_transformers import SentenceTransformer
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sentences = ["
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model = SentenceTransformer('
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embeddings = model.encode(sentences)
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print(embeddings)
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```
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## Usage (HuggingFace Transformers)
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Without [sentence-transformers](https://www.SBERT.net), you can use the model like this: First, you pass your input through the transformer model, then you have to apply the right pooling-operation on-top of the contextualized word embeddings.
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```python
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from transformers import AutoTokenizer, AutoModel
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import torch
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input_mask_expanded = attention_mask.unsqueeze(-1).expand(token_embeddings.size()).float()
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return torch.sum(token_embeddings * input_mask_expanded, 1) / torch.clamp(input_mask_expanded.sum(1), min=1e-9)
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# Sentences we want sentence embeddings for
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sentences = ['This is an example sentence', 'Each sentence is converted']
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# Load model from HuggingFace Hub
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tokenizer = AutoTokenizer.from_pretrained('
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model = AutoModel.from_pretrained('
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# Tokenize sentences
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encoded_input = tokenizer(sentences, padding=True, truncation=True, return_tensors='pt')
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# Compute token embeddings
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with torch.no_grad():
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model_output = model(**encoded_input)
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# Perform pooling. In this case, mean pooling.
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sentence_embeddings = mean_pooling(model_output, encoded_input['attention_mask'])
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print("Sentence embeddings:")
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print(sentence_embeddings)
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```
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## Evaluation Results
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<!--- Describe how your model was evaluated -->
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For an automated evaluation of this model, see the *Sentence Embeddings Benchmark*: [https://seb.sbert.net](https://seb.sbert.net?model_name={MODEL_NAME})
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## Training
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The model was trained with the parameters:
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**DataLoader**:
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`torch.utils.data.dataloader.DataLoader` of length 2226 with parameters:
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```
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```
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{
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"evaluation_steps": 0,
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"evaluator": "NoneType",
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"max_grad_norm": 1,
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"optimizer_class": "<class 'transformers.optimization.AdamW'>",
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"optimizer_params": {
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"lr": 1e-05
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},
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"scheduler": "WarmupLinear",
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"steps_per_epoch": null,
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"warmup_steps": 1113,
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"weight_decay": 0.01
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}
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```
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---
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language:
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- pt
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thumbnail: Portuguese BERT for the Legal Domain
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tags:
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- sentence-transformers
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- transformers
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- bert
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- pytorch
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- sentence-similarity
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license: mit
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pipeline_tag: sentence-similarity
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datasets:
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- stjiris/portuguese-legal-sentences-v0
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- assin
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- assin2
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- stsb_multi_mt
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widget:
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- source_sentence: "O advogado apresentou as provas ao juíz."
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sentences:
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- "O juíz leu as provas."
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- "O juíz leu o recurso."
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- "O juíz atirou uma pedra."
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model-index:
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- name: BERTimbau
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results:
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- task:
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name: STS
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type: STS
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metrics:
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- name: Pearson Correlation - assin Dataset
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type: Pearson Correlation
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value: 0.7736839315650635
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- name: Pearson Correlation - assin2 Dataset
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type: Pearson Correlation
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value: 0.8160303683026692
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- name: Pearson Correlation - stsb_multi_mt pt Dataset
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type: Pearson Correlation
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value: 0.8549555966003046
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- name: Pearson Correlation - IRIS sts Dataset
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type: Pearson Correlation
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value: 0.7873379128441461
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---
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[![INESC-ID](https://www.inesc-id.pt/wp-content/uploads/2019/06/INESC-ID-logo_01.png)](https://www.inesc-id.pt/projects/PR07005/)
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[![A Semantic Search System for Supremo Tribunal de Justiça](https://rufimelo99.github.io/SemanticSearchSystemForSTJ/_static/logo.png)](https://rufimelo99.github.io/SemanticSearchSystemForSTJ/)
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Work developed as part of [Project IRIS](https://www.inesc-id.pt/projects/PR07005/).
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Thesis: [A Semantic Search System for Supremo Tribunal de Justiça](https://rufimelo99.github.io/SemanticSearchSystemForSTJ/)
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# stjiris/bert-large-portuguese-cased-legal-tsdae-mkd-nli-sts-v1 (Legal BERTimbau)
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This is a [sentence-transformers](https://www.SBERT.net) model: It maps sentences & paragraphs to a 1024 dimensional dense vector space and can be used for tasks like clustering or semantic search.
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stjiris/bert-large-portuguese-cased-legal-tsdae-mkd-nli-sts-v1 derives from stjiris/bert-large-portuguese-cased-legal-mlm (legal variant of [BERTimbau](https://huggingface.co/neuralmind/bert-large-portuguese-cased) large).
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It was trained using the TSDAE technique with a learning rate 1e-5 [Legal Sentences from +-30000 documents](https://huggingface.co/datasets/stjiris/portuguese-legal-sentences-v1.0) 21.2k training steps (best performance for our semantic search system implementation)
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This model was subjected to Multilingual Knowledge Distillation technique (mkd). For the Multilingual Knowledge Distillation process, the teacher model was 'sentence-transformers/stsb-roberta-large', the supposed supported language as English and the language to learn was portuguese
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The dataset used was: TED 2020 – Parallel Sentences Corpus. TED 2020 contains around 4000 TED and TED-X transcripts from July 2020. These transcripts were translated by volunteers into more than 100 languages, adding up to a total of 10 544 174 sentences.
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The model was presented to NLI data. 16 batch size, 2e-5 lr
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It was trained for Semantic Textual Similarity, being submitted to a fine tuning stage with the [assin](https://huggingface.co/datasets/assin), [assin2](https://huggingface.co/datasets/assin2), [stsb_multi_mt pt](https://huggingface.co/datasets/stsb_multi_mt) datasets. 'lr': 1e-5
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## Usage (Sentence-Transformers)
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Using this model becomes easy when you have [sentence-transformers](https://www.SBERT.net) installed:
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```
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pip install -U sentence-transformers
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```
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Then you can use the model like this:
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```python
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from sentence_transformers import SentenceTransformer
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sentences = ["Isto é um exemplo", "Isto é um outro exemplo"]
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model = SentenceTransformer('stjiris/bert-large-portuguese-cased-legal-tsdae-mkd-nli-sts-v1')
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embeddings = model.encode(sentences)
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print(embeddings)
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```
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## Usage (HuggingFace Transformers)
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```python
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from transformers import AutoTokenizer, AutoModel
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import torch
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input_mask_expanded = attention_mask.unsqueeze(-1).expand(token_embeddings.size()).float()
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return torch.sum(token_embeddings * input_mask_expanded, 1) / torch.clamp(input_mask_expanded.sum(1), min=1e-9)
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# Sentences we want sentence embeddings for
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sentences = ['This is an example sentence', 'Each sentence is converted']
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# Load model from HuggingFace Hub
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tokenizer = AutoTokenizer.from_pretrained('stjiris/bert-large-portuguese-cased-legal-tsdae-mkd-nli-sts-v1')
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model = AutoModel.from_pretrained('stjiris/bert-large-portuguese-cased-legal-tsdae-mkd-nli-sts-v1')
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# Tokenize sentences
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encoded_input = tokenizer(sentences, padding=True, truncation=True, return_tensors='pt')
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# Compute token embeddings
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with torch.no_grad():
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model_output = model(**encoded_input)
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# Perform pooling. In this case, mean pooling.
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sentence_embeddings = mean_pooling(model_output, encoded_input['attention_mask'])
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print("Sentence embeddings:")
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print(sentence_embeddings)
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```
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## Full Model Architecture
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```
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SentenceTransformer(
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(0): Transformer({'max_seq_length': 514, 'do_lower_case': False}) with Transformer model: BertModel
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(1): Pooling({'word_embedding_dimension': 1028, 'pooling_mode_cls_token': False, 'pooling_mode_mean_tokens': True, 'pooling_mode_max_tokens': False, 'pooling_mode_mean_sqrt_len_tokens': False, 'pooling_mode_weightedmean_tokens': False, 'pooling_mode_lasttoken': False})
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)
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```
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## Citing & Authors
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### Contributions
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[@rufimelo99](https://github.com/rufimelo99)
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If you use this work, please cite:
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```bibtex
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@inproceedings{MeloSemantic,
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author = {Melo, Rui and Santos, Professor Pedro Alexandre and Dias, Professor Jo{\~ a}o},
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title = {A {Semantic} {Search} {System} for {Supremo} {Tribunal} de {Justi}{\c c}a},
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}
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@inproceedings{souza2020bertimbau,
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author = {F{\'a}bio Souza and
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Rodrigo Nogueira and
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Roberto Lotufo},
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title = {{BERT}imbau: pretrained {BERT} models for {B}razilian {P}ortuguese},
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booktitle = {9th Brazilian Conference on Intelligent Systems, {BRACIS}, Rio Grande do Sul, Brazil, October 20-23 (to appear)},
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year = {2020}
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}
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@inproceedings{fonseca2016assin,
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title={ASSIN: Avaliacao de similaridade semantica e inferencia textual},
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author={Fonseca, E and Santos, L and Criscuolo, Marcelo and Aluisio, S},
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booktitle={Computational Processing of the Portuguese Language-12th International Conference, Tomar, Portugal},
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pages={13--15},
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year={2016}
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}
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@inproceedings{real2020assin,
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title={The assin 2 shared task: a quick overview},
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author={Real, Livy and Fonseca, Erick and Oliveira, Hugo Goncalo},
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booktitle={International Conference on Computational Processing of the Portuguese Language},
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pages={406--412},
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year={2020},
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organization={Springer}
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}
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@InProceedings{huggingface:dataset:stsb_multi_mt,
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title = {Machine translated multilingual STS benchmark dataset.},
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author={Philip May},
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year={2021},
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url={https://github.com/PhilipMay/stsb-multi-mt}
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}
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```
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