A Feature-based Ensemble Approach to Recognition of Emerging and Rare Named Entities Utpal Kumar Sikdar author Björn Gambäck author 2017-09 text Proceedings of the 3rd Workshop on Noisy User-generated Text Leon Derczynski editor Wei Xu editor Alan Ritter editor Tim Baldwin editor Association for Computational Linguistics Copenhagen, Denmark conference publication sikdar-gamback-2017-feature 10.18653/v1/W17-4424 https://aclanthology.org/W17-4424/ 2017-09 177 181