fix ner_tag bugs in thainer
CONTRIBUTOR
> Thanks :)
> 
> Apparently the dummy_data.zip got removed. Is this expected ?
> Also can you remove the `data-pos.conll` file that you added ?

Not expected. I forgot to remove the `dummy_data` folder used to create `dummy_data.zip`. 
Changed to only `dummy_data.zip`.
2021-01-07T14:26:36Z
https://github.com/huggingface/datasets/pull/1695#issuecomment-756148914
https://api.github.com/repos/huggingface/datasets/issues/1695
MDEyOklzc3VlQ29tbWVudDc1NjE0ODkxNA==
https://api.github.com/repos/huggingface/datasets/issues/comments/756148914/reactions
2021-01-07T14:26:36Z
https://api.github.com/repos/huggingface/datasets/issues/comments/756148914
https://avatars.githubusercontent.com/u/15519308?v=4
https://api.github.com/users/cstorm125/events{/privacy}
https://api.github.com/users/cstorm125/followers
https://api.github.com/users/cstorm125/following{/other_user}
https://api.github.com/users/cstorm125/gists{/gist_id}
https://github.com/cstorm125
cstorm125
MDQ6VXNlcjE1NTE5MzA4
https://api.github.com/users/cstorm125/orgs
https://api.github.com/users/cstorm125/received_events
https://api.github.com/users/cstorm125/repos
https://api.github.com/users/cstorm125/starred{/owner}{/repo}
https://api.github.com/users/cstorm125/subscriptions
User
https://api.github.com/users/cstorm125
public
fix bug that results in `ner_tag` always equal to 'O'.