Learning context-free grammars to extract relations from text.

Georgios Petasis Vangelis Karkaletsis Georgios Paliouras Constantine D. Spyropoulos Learning context-free grammars to extract relations from text. 303-307 2008 ECAI http://dx.doi.org/10.3233/978-1-58603-891-5-303 conf/ecai/2008 db/conf/ecai/ecai2008.html#PetasisKPS08