added ohsumed 
{'login': 'skyprince999', 'id': 9033954, 'node_id': 'MDQ6VXNlcjkwMzM5NTQ=', 'avatar_url': 'https://avatars.githubusercontent.com/u/9033954?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/skyprince999', 'html_url': 'https://github.com/skyprince999', 'followers_url': 'https://api.github.com/users/skyprince999/followers', 'following_url': 'https://api.github.com/users/skyprince999/following{/other_user}', 'gists_url': 'https://api.github.com/users/skyprince999/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/skyprince999/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/skyprince999/subscriptions', 'organizations_url': 'https://api.github.com/users/skyprince999/orgs', 'repos_url': 'https://api.github.com/users/skyprince999/repos', 'events_url': 'https://api.github.com/users/skyprince999/events{/privacy}', 'received_events_url': 'https://api.github.com/users/skyprince999/received_events', 'type': 'User', 'site_admin': False}
[]
[]
UPDATE2: PR passed all tests. Now waiting for review.

UPDATE: pushed  a new version. cross fingers that it should complete all the tests! :) 
               If it passes all tests then it's not a draft version. 

This is a draft version 
{'url': 'https://api.github.com/repos/huggingface/datasets/issues/1537/reactions', 'total_count': 0, '+1': 0, '-1': 0, 'laugh': 0, 'hooray': 0, 'confused': 0, 'heart': 0, 'rocket': 0, 'eyes': 0}
{'url': 'https://api.github.com/repos/huggingface/datasets/pulls/1537', 'html_url': 'https://github.com/huggingface/datasets/pull/1537', 'diff_url': 'https://github.com/huggingface/datasets/pull/1537.diff', 'patch_url': 'https://github.com/huggingface/datasets/pull/1537.patch', 'merged_at': '2020-12-17T18:28:16Z'}