@inproceedings{McCallum-Li:2003:CONLL,
  author = {McCallum, Andrew  and  Li, Wei},
  title  = {Early results for Named Entity Recognition with Conditional Random Fields, Feature Induction and Web-Enhanced Lexicons},
  booktitle = {Proceedings of the Seventh Conference on Natural Language Learning at HLT-NAACL 2003},
  editor = {Walter Daelemans and Miles Osborne},
  url    = {http://www.aclweb.org/anthology/W03-0430.pdf},
  year   = 2003,
  pages  = {188--191}