Add hotpot QA
MEMBER
Awesome :) 

Don't pay attention to the RemoteDatasetTest error, I'm fixing it right now
2020-10-02T11:56:53Z
https://github.com/huggingface/datasets/pull/703#issuecomment-702692968
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2020-10-02T11:56:53Z
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MEMBER
You can rebase from master to fix the CI test :)
2020-10-02T12:12:46Z
https://github.com/huggingface/datasets/pull/703#issuecomment-702699952
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MEMBER
If we're lucky we can even include this dataset in today's release
2020-10-02T12:15:11Z
https://github.com/huggingface/datasets/pull/703#issuecomment-702700855
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CONTRIBUTOR
Just thinking since `type` can only be `comparison` or `bridge` and `level` can only be `easy`, `medium`, `hard` should they be `ClassLabel`?
2020-10-02T12:25:19Z
https://github.com/huggingface/datasets/pull/703#issuecomment-702705077
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MEMBER
> Just thinking since `type` can only be `comparison` or `bridge` and `level` can only be `easy`, `medium`, `hard` should they be `ClassLabel`?

I think it's more a tag than a label. I guess a string is fine

2020-10-02T12:28:37Z
https://github.com/huggingface/datasets/pull/703#issuecomment-702706492
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2020-10-02T12:28:37Z
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Added the [HotpotQA](https://github.com/hotpotqa/hotpot) multi-hop question answering dataset.

