PackPlay: Mining Semantic Data in Collaborative Games Nathan Green author Paul Breimyer author Vinay Kumar author Nagiza Samatova author 2010-07 text Proceedings of the Fourth Linguistic Annotation Workshop Nianwen Xue editor Massimo Poesio editor Association for Computational Linguistics Uppsala, Sweden conference publication green-etal-2010-packplay https://aclanthology.org/W10-1837/ 2010-07 227 234