Probabilistic Context-Free Grammar Induction Based on Structural Zeros Mehryar Mohri author Brian Roark author 2006-06 text Proceedings of the Human Language Technology Conference of the NAACL, Main Conference Robert C Moore editor Jeff Bilmes editor Jennifer Chu-Carroll editor Mark Sanderson editor Association for Computational Linguistics New York City, USA conference publication mohri-roark-2006-probabilistic https://aclanthology.org/N06-1040/ 2006-06 312 319