Add twi text c3
looks like this PR includes changes about other datasets

Can you only include the changes related to twi text c3 please ? Hi @lhoestq , I have removed the unnecessary files. Can you please confirm? You might need to either find a way to go back to the commit before it changes 389 files or create a new branch. okay, I have created another branch, see the latest pull https://github.com/huggingface/datasets/pull/1518  @cstorm125  Hii please follow me Closing this one in favor of #1518
Added Twi texts for training embeddings and language models based on the paper https://www.aclweb.org/anthology/2020.lrec-1.335/