@inproceedings{verdu2000conll,
   author     = "Jose Luis Verd{\'u}-Mas and Jorge Calera-Rubio and 
                 Rafael C. Carrasco",
   title      = "A Comparison of PCFG Models",
   booktitle  = "Proceedings of CoNLL-2000 and LLL-2000",
   editor     = "Claire Cardie and Walter Daelemans and Claire
                 Nedellec and Tjong Kim Sang, Erik",
   publisher  = "Lisbon, Portugal",
   pages      = "123--126",
   year       = "2000"
}