Factored features allow the language model to capture linguistic patterns at multiple levels of abstraction.
this feature is more precise POS Extended POS Noun SingNoun, PlurNoun Pronoun Sing3PPronoun, OtherPronoun Verb InfVerb, ProgrVerb, SimplePastVerb, PastPartVerb, Sing3PVerb, OtherVerb Table 1: Extended tagset used for the third factor in the proposed discriminative language model.