The Same-Head Heuristic for Coreference
Micha Elsner, Eugene Charniak · 2010
We investigate coreference relationships between NPs with the same head noun. It is relatively common in unsupervised work to assume that such pairs are coreferent { but this is not always true, especially if realistic mention detection is used. We describe the distribution of non-coreferent same-head pairs in news and conversational discourse. We present an unsupervised generative model which learns not to link some same-head NPs using syntactic features. Our model improves precision on both news and conversation. 1.