---
language:
- en
license:
- other
multilinguality:
- monolingual
pretty_name: t_rex
---
# Dataset Card for "relbert/t_rex"
## Dataset Description
- **Repository:** [https://hadyelsahar.github.io/t-rex/](https://hadyelsahar.github.io/t-rex/)
- **Paper:** [https://aclanthology.org/L18-1544/](https://aclanthology.org/L18-1544/)
- **Dataset:** T-REX
## Dataset Summary
This is the T-REX dataset proposed in [https://aclanthology.org/L18-1544/](https://aclanthology.org/L18-1544/).
The test split is universal across different version, which is manually checked by the author of [relbert/t_rex](https://huggingface.co/datasets/relbert/t_rex),
and the test split contains predicates that is not included in the train/validation split.
The train/validation splits are created for each configuration by the ratio of 9:1.
The number of triples in each split is summarized in the table below.
- train/validation split
| data | number of triples (train) | number of triples (validation) | number of triples (all) | number of unique predicates (train) | number of unique predicates (validation) | number of unique predicates (all) | number of unique entities (train) | number of unique entities (validation) | number of unique entities (all) |
|:----------------------------------------------|----------------------------:|---------------------------------:|--------------------------:|--------------------------------------:|-------------------------------------------:|------------------------------------:|------------------------------------:|-----------------------------------------:|----------------------------------:|
| filter_unified.min_entity_1_max_predicate_100 | 7,075 | 787 | 9,193 | 212 | 166 | 246 | 8,496 | 1,324 | 10,454 |
| filter_unified.min_entity_1_max_predicate_50 | 4,131 | 459 | 5,304 | 212 | 156 | 246 | 5,111 | 790 | 6,212 |
| filter_unified.min_entity_1_max_predicate_25 | 2,358 | 262 | 3,034 | 212 | 144 | 246 | 3,079 | 465 | 3,758 |
| filter_unified.min_entity_1_max_predicate_10 | 1,134 | 127 | 1,465 | 210 | 94 | 246 | 1,587 | 233 | 1,939 |
| filter_unified.min_entity_2_max_predicate_100 | 4,873 | 542 | 6,490 | 195 | 139 | 229 | 5,386 | 887 | 6,704 |
| filter_unified.min_entity_2_max_predicate_50 | 3,002 | 334 | 3,930 | 193 | 139 | 229 | 3,457 | 575 | 4,240 |
| filter_unified.min_entity_2_max_predicate_25 | 1,711 | 191 | 2,251 | 195 | 113 | 229 | 2,112 | 331 | 2,603 |
| filter_unified.min_entity_2_max_predicate_10 | 858 | 96 | 1,146 | 194 | 81 | 229 | 1,149 | 177 | 1,446 |
| filter_unified.min_entity_3_max_predicate_100 | 3,659 | 407 | 4,901 | 173 | 116 | 208 | 3,892 | 662 | 4,844 |
| filter_unified.min_entity_3_max_predicate_50 | 2,336 | 260 | 3,102 | 174 | 115 | 208 | 2,616 | 447 | 3,240 |
| filter_unified.min_entity_3_max_predicate_25 | 1,390 | 155 | 1,851 | 173 | 94 | 208 | 1,664 | 272 | 2,073 |
| filter_unified.min_entity_3_max_predicate_10 | 689 | 77 | 937 | 171 | 59 | 208 | 922 | 135 | 1,159 |
| filter_unified.min_entity_4_max_predicate_100 | 2,995 | 333 | 4,056 | 158 | 105 | 193 | 3,104 | 563 | 3,917 |
| filter_unified.min_entity_4_max_predicate_50 | 1,989 | 222 | 2,645 | 157 | 102 | 193 | 2,225 | 375 | 2,734 |
| filter_unified.min_entity_4_max_predicate_25 | 1,221 | 136 | 1,632 | 158 | 76 | 193 | 1,458 | 237 | 1,793 |
| filter_unified.min_entity_4_max_predicate_10 | 603 | 68 | 829 | 157 | 52 | 193 | 797 | 126 | 1,018 |
- test split
| number of triples (test) | number of unique predicates (test) | number of unique entities (test) |
|---------------------------:|-------------------------------------:|-----------------------------------:|
| 122 | 34 | 188 |
### Filtering to Remove Noise
We apply filtering to keep triples with alpha-numeric subject and object, as well as triples with at least either of subject or object is a named-entity.
After the filtering, we manually remove too vague and noisy predicate, and unify same predicates with different names (see the annotation [here](https://huggingface.co/datasets/relbert/t_rex/raw/main/predicate_manual_check.csv)).
| Dataset | `raw` | `filter` | `filter_unified` |
|:----------|----------:|----------:|-----------------:|
| Triples | 941,663 | 583,333 | 432,795 |
| Predicate | 931 | 659 | 247 |
| Entity | 270,801 | 197,163 | 149,172 |
### Filtering to Purify the Dataset
We reduce the size of the dataset by applying filtering based on the number of predicates and entities in the triples.
We first remove triples that contain either of subject or object with the occurrence in the dataset that is lower than `min entity`.
Then, we reduce the number triples in each predicate to be less than `max predicate`.
If the number of triples in a predicate is higher than `max predicate`,
we choose top-`max predicate` triples based on the frequency of the subject and the object, or random sampling.
- distribution of entities
- distribution of predicates
## Dataset Structure
### Data Instances
An example looks as follows.
```
{
"object": "Persian",
"subject": "Tajik",
"title": "Tandoor bread",
"text": "Tandoor bread (Arabic: \u062e\u0628\u0632 \u062a\u0646\u0648\u0631 khubz tannoor, Armenian: \u0569\u0578\u0576\u056b\u0580 \u0570\u0561\u0581 tonir hats, Azerbaijani: T\u0259ndir \u00e7\u00f6r\u0259yi, Georgian: \u10d7\u10dd\u10dc\u10d8\u10e1 \u10de\u10e3\u10e0\u10d8 tonis puri, Kazakh: \u0442\u0430\u043d\u0434\u044b\u0440 \u043d\u0430\u043d tandyr nan, Kyrgyz: \u0442\u0430\u043d\u0434\u044b\u0440 \u043d\u0430\u043d tandyr nan, Persian: \u0646\u0627\u0646 \u062a\u0646\u0648\u0631\u06cc nan-e-tanuri, Tajik: \u043d\u043e\u043d\u0438 \u0442\u0430\u043d\u0443\u0440\u0439 noni tanuri, Turkish: Tand\u0131r ekme\u011fi, Uyghur: ) is a type of leavened bread baked in a clay oven called a tandoor, similar to naan. In Pakistan, tandoor breads are popular especially in the Khyber Pakhtunkhwa and Punjab regions, where naan breads are baked in tandoor clay ovens fired by wood or charcoal. These tandoor-prepared naans are known as tandoori naan.",
"predicate": "[Artifact] is a type of [Type]"
}
```
## Reproduce the Dataset
```shell
git clone https://huggingface.co/datasets/relbert/t_rex
cd t_rex
mkdir data_raw
cd data_raw
cd data_raw
wget https://figshare.com/ndownloader/files/8760241
unzip 8760241
cd ../
python process.py
python unify_predicate.py
python filtering_purify.py
python create_split.py
```
## Citation Information
```
@inproceedings{elsahar2018t,
title={T-rex: A large scale alignment of natural language with knowledge base triples},
author={Elsahar, Hady and Vougiouklis, Pavlos and Remaci, Arslen and Gravier, Christophe and Hare, Jonathon and Laforest, Frederique and Simperl, Elena},
booktitle={Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)},
year={2018}
}
```