Lease and Charniak (2005) use the Charniak parser for biomedical data and find that the use of out-of-domain trees and in-domain vocabulary information can considerably improve performance.
the work which is most directly comparable to ours is that of (Ratnaparkhi, 1999;Hwa, 1999;Gildea, 2001;Bacchiani et al., 2006).