@inproceedings{Zhang-Johnson:2003:CONLL,
  author = {Zhang, Tong  and  Johnson, David},
  title  = {A Robust Risk Minimization based Named Entity Recognition System},
  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/W03-0434.pdf},
  year   = 2003,
  pages  = {204--207}