Effective Crowd Annotation for Relation Extraction Angli Liu author Stephen Soderland author Jonathan Bragg author Christopher H Lin author Xiao Ling author Daniel S Weld author 2016-06 text Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Kevin Knight editor Ani Nenkova editor Owen Rambow editor Association for Computational Linguistics San Diego, California conference publication liu-etal-2016-effective 10.18653/v1/N16-1104 https://aclanthology.org/N16-1104/ 2016-06 897 906