Add yoruba text c3
Added Yoruba texts for training embeddings and language models based on the paper https://www.aclweb.org/anthology/2020.lrec-1.335/
looks like this PR includes changes about other datasets
 Thanks for the review. I'm a bit confused how to remove the files. Every time I add a new branch name using the following commands:

git fetch upstream
git rebase upstream/master
git checkout -b a-descriptive-name-for-my-changes

and push to the origin, this issue occurs Can you try to create the branch from the master branch of your fork ?

first update your master branch:
```
git checkout master
git fetch upstream
git rebase upstream/master
git push
```

then create a new one:
```
git checkout -b my-new-branch
``` I think you were still having the files because you were creating the new branch from a branch in which you've committed the files, instead of creating the new branch from the master branch Got it, will correct that. Thanks @lhoestq , I have removed the unnecessary files. Looks like I still have one error. How do I resolve this? > @lhoestq , I have removed the unnecessary files. Looks like I still have one error. How do I resolve this?

I think it's connection error on piqa dataset. Can you try triggering the test again? I usually resolve similar issues with:
```
git fetch upstream
git rebase upstream/master
git push -u -f origin your_branch_name
``` thank you  @cstorm125  I have created another pull request for this https://github.com/huggingface/datasets/pull/1515 @cstorm125  @lhoestq  Hii please follow me merging since the CI is fixed on master Great, thanks a lot