@inproceedings{zhangb2003conll,
   author     = "Tong Zhang and David Johnson",
   title      = "A Robust Risk Minimization based Named Entity 
                 Recognition System",
   booktitle  = "Proceedings of CoNLL-2003",
   editor     = "Walter Daelemans and Miles Osborne",
   publisher  = "Edmonton, Canada",
   pages      = "204--207",
   year       = "2003"
}