Paper: A Hybrid Japanese Parser With Hand-Crafted Grammar And Statistics

ACL ID C00-1060
Title A Hybrid Japanese Parser With Hand-Crafted Grammar And Statistics
Venue International Conference on Computational Linguistics
Session Main Conference
Year 2000
Authors

This l)al)er (leseril)es a hybrid t)arsing method for Jal)anese which uses both a hand-crafted gram- mar and a statistical 1;e(:hniqlte. The key featm'e of our syst(nn is that in order to estimate likeli- hood for a parse tree, the systeln Ilses informa- tion taken from Mternative 1)artial parse trees gen- erated by the grammar. This utilization of alter- native trees enables us to construct a new statis- tical model called 'l}'it)let/Quadrul)let Model. We show that this model can capture a certain ten- dency in .]apalmse syntactic structures and this point COlltril)lltes to ilnl)rovetllellt of l)al'sill~ acctlracy oil a shallow level. We rel)ort that, with an under- Sl)ecified HPSG-1)ased grammar and ~t maximum en- tropy estilnation, our parser achieved high a(:curacy: 88.6% accuracy in d...