Differential Evolution Based Feature Selection and Classifier Ensemble for Named Entity Recognition Utpal Kumar Sikdar author Asif Ekbal author Sriparna Saha author 2012-12 text Proceedings of COLING 2012 Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication sikdar-etal-2012-differential https://aclanthology.org/C12-1151/ 2012-12 2475 2490