... Association for Computational Linguistics, pages 846–855,Portland, Oregon, June 19-24, 2011.c2011 Association for Computational LinguisticsLearning to Transform and Select Elementary Trees for Improved Syntax-based ... pseudo nodes and hyper edges to the forest,which makes the forest even denser and harder for nav-igation and search. As trees thrive in the search space,especially with the pseudo nodes and edges ... observed for different genres. On DEV10-NW, we observed 1.29 BLEU points improvement, and about 0.63 and 0.98 improved BLEU points for MT08-WB and DEV10-WB, respectively. The improvements for newwire...