Feature-Rich Constituent Context Model for Grammar Induction
Abstract: We present LLCCM, a log-linear variant of the constituent
context model (CCM) of grammar induction. LLCCM retains the simplicity of the original
CCM but extends robustly to long sentences. On sentences of up to length 40, LLCCM
outperforms CCM by 13.9% brack- eting F1 and outperforms a right-branching baseline in
regimes where CCM does not.