CoNLLpp is a corrected version of the CoNLL2003 NER dataset where labels of 5.38% of the sentences in the test set
have been manually corrected. The training set and development set are included for completeness.
For more details see
https://www.aclweb.org/anthology/D19-1519/ and
https://github.com/ZihanWangKi/CrossWeigh
