Feature Subset Selection in Conditional Random Fields for Named Entity Recognition Roman Klinger author Christoph M Friedrich author 2009-09 text Proceedings of the International Conference RANLP-2009 Galia Angelova editor Ruslan Mitkov editor Association for Computational Linguistics Borovets, Bulgaria conference publication klinger-friedrich-2009-feature https://aclanthology.org/R09-1035/ 2009-09 185 191