Parsing (State of the art)

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  • Performance measure: PARSEVAL - the evalb program
  • Training data: sections 2-22 of Wall Street Journal corpus
  • Testing data: section 23 of Wall Street Journal corpus


System name Short description Main publications Software Results (PARSEVAL) Comments
Johnson & Charniak's Parser Lexicalized N-Best PCFG + Discriminative re-reanking Johnson and Charniak (2005) download 91.4% works well also on Brown
Collins' Parser Lexicalized PCFG Collins (1999), Bikel's Thesis [1] Dan Bikel's implementation  ???
Berkeley Parser Automatically induced PCFG Petrov, Barrett, Thibaux and Klein, ACL 2006 [2], Petrov and Klein, NAACL 2007 [3] Berkeley Parser 90.1% works well also for Chinese and German


Collins, M. (1999). Head-driven statistical models for natural language parsing. PhD Thesis, Computer and Information Science, University of Pennsylvania.

Johnson, M., and Charniak, E. (2005). Coarse-to-fine n-best parsing and MaxEnt discriminative reranking. Proceedings of the 43rd Annual Meeting of the ACL, pages 173–180, Ann Arbor, June 2005.