author= {Stein, Daniel and Vilar, David and Ney, Hermann},
editor= {Olive, Joseph and Christianson, Caitlin and McCary, John},
title= {Soft Syntax Features and Other Extensions for Hierarchical SMT},
chapter= {2.4.3},
pages= {198-202},
publisher= {Springer},
year= 2013,
booktitle= {Handbook of Natural Language processing and Machine Translation: DARPA Global Autonomous Language Exploitation (GALE)},
address= {New York, NY, USA},
month= sep