14We parse each sentence with the Collins parser ( Collins , 1999 ) .
headdriven statistical models for natural language parsing
Michael Collins
We do not use any other lexical 0-features that reference x , for fear that they would enable the learner to explain the rationales without changing 0 as desired ( see the end of section 5.3 ) . 14We parse each sentence with the Collins parser ( Collins , 1999 ) . Then the document has one big parse tree , whose root is DOC , with each sentence being a child of DOC .
14We parse each sentence with the Collins parser ( @@CITATION ) .