Unknown Penn Treebank II LDC WSJ Copyright (C) 1995 University of Pennsylvania Penn_treebank_2/PARSED/WSJ/06/WSJ_0669.PRD 22 Dec 1994 2007 Ron Artstein MMAX2 Conversion File converted to MMAX2 format 2007 Yannick Versley, Ron Artstein Corpus developers Removed traces and other 2009 Massimo Poesio Annotator Annotated 2010 Francesca Delogu, Kepa Rodriguez Corpus maintainers Checked annotation 2013 Antonella Bristot, Olga Uryupina Checkers Checked annotation, added genericity