The RWTH Aachen Machine Translation System for WMT 2011. - Matthias Huck; Joern Wuebker; Christoph Schmidt; Markus Freitag; Stephan Peitz; Daniel Stein; Arnaud Dagnelies; Saab Mansour; Gregor Leusch; Hermann Ney (WMT@EMNLP, 2011)