Manually defined heuristics are used to automatically annotate each tree in the treebank with partially specified HPSG derivation trees : Head/argument/modifier distinctions are made for each node in the tree based on Magerman ( 1994 ) and Collins ( 1997 ) ;
three generative lexicalised models for statistical parsing
Michael Collins
Miyao , Ninomiya , and Tsujii ( 2004 ) and Nakanishi , Miyao , and Tsujii ( 2004 ) describe a methodology for acquiring an English HPSG from the Penn-II Treebank . Manually defined heuristics are used to automatically annotate each tree in the treebank with partially specified HPSG derivation trees : Head/argument/modifier distinctions are made for each node in the tree based on Magerman ( 1994 ) and Collins ( 1997 ) ; the whole tree is then converted to a binary tree ; heuristics are applied to deal with phenomena such as LDDs and coordination and to correct some errors in the treebank , and finally an HPSG category is assigned to each node in the tree in accordance with its CFG category .
Manually defined heuristics are used to automatically annotate each tree in the treebank with partially specified HPSG derivation trees : Head/argument/modifier distinctions are made for each node in the tree based on Magerman ( 1994 ) and @@CITATION ;