Cipher: A Prototype Game-with-a-Purpose for Detecting Errors in Text Liang Xu author Jon Chamberlain author 2020-05 text eng Workshop on Games and Natural Language Processing Stephanie M Lukin editor European Language Resources Association Marseille, France conference publication 979-10-95546-40-5 xu-chamberlain-2020-cipher https://aclanthology.org/2020.gamnlp-1.3/ 2020-05 17 25