Breaking the Closed World Assumption in Text Classification Geli Fei author Bing Liu 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 fei-liu-2016-breaking 10.18653/v1/N16-1061 https://aclanthology.org/N16-1061/ 2016-06 506 514