Problem downloading GEM wiki_auto_asset_turk dataset
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["Hi,\r\n\r\nsadly I can't replicate the problem on my Windows machine. Try to update the library to the newest version with:\r\n```bash\r\npip install git+https://github.com/huggingface/datasets\r\n``` "
 "Thanks for the answer! I updated the library but unfortunately it didn't solve the problem."
 'Is there an error message ?\r\nWhat stacktrace do you get if you interrupt the execution of the program while downloading ?'
 "Sorry for the long time since my last comment, I tried again and don't seem to have the problem anymore, thanks for your support!"
 "Great ! I'm closing the issue then. Feel free to re-open if you experience this issue again"]
@yjernite 

### Summary

I am currently working on the GEM datasets and do not manage to download the wiki_auto_asset_turk data, whereas all other datasets download well with the same code.

### Steps to reproduce
Code snippet:

from datasets import load_dataset
#dataset = load_dataset('gem', 'web_nlg_en')
dataset = load_dataset('gem', 'wiki_auto_asset_turk')

```

**Expected behavior:**

I expect the dataset to start downloading (download bar appears and progresses toward 100%)

**Actual behavior:**
Instead of seeing the download bar appearing, nothing happens; the following appears in the console as expected, but nothing more:

Downloading: 36.6kB [00:00, 37.2MB/s]
Downloading: 41.7kB [00:00, ?B/s]
Downloading and preparing dataset gem/wiki_auto_asset_turk (download: 121.37 MiB, generated: 145.69 MiB, post-processed: Unknown size, total: 267.07 MiB) to C:\Users\sfmil\.cache\huggingface\datasets\gem\wiki_auto_asset_turk\1.0.0\f252756d7f1b8f019aac71a1623b2950acfe10d25d956668ac4eae4e93c58b8d...

### Is this a regression?
No, it was the first time I was trying to download this dataset (same for the other ones).

### Debug info
- Python version: Python 3.8.2
- OS version: Windows 10 Family
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