Feature-Rich Twitter Named Entity Recognition and Classification Utpal Kumar Sikdar author Björn Gambäck author 2016-12 text Proceedings of the 2nd Workshop on Noisy User-generated Text (WNUT) Bo Han editor Alan Ritter editor Leon Derczynski editor Wei Xu editor Tim Baldwin editor The COLING 2016 Organizing Committee Osaka, Japan conference publication sikdar-gamback-2016-feature https://aclanthology.org/W16-3922/ 2016-12 164 170