@inproceedings{tsuruoka2003conll,
   author     = "Yoshimasa Tsuruoka and Jun'ichi Tsujii",
   title      = "Training a Naive Bayes Classifier via the EM Algorithm
                 with a Class Distribution Constraint",
   booktitle  = "Proceedings of CoNLL-2003",
   editor     = "Walter Daelemans and Miles Osborne",
   publisher  = "Edmonton, Canada",
   pages      = "127--134",
   year       = "2003"
}