conll2002 issues
**Link:** https://huggingface.co/datasets/conll2002

The dataset viewer throws a server error when trying to preview the dataset. 

```
Message:       Extraction protocol 'train' for file at 'https://raw.githubusercontent.com/teropa/nlp/master/resources/corpora/conll2002/esp.train' is not implemented yet
```

In addition, the "point of contact" has encoding issues and does not work when clicked.

Am I the one who added this dataset ? No, @lhoestq  did