Zollmann and Venugopal ( 2006 ) substituted the non-terminal X in hierarchical phrase-based model by extended syntactic categories .
syntax augmented machine translation via chart parsing
Andreas Zollmann Ashish Venugopal
Compared to their work , we do not rely on any Tree-bank resources and focus on generating effective unsupervised tree structures for tree-based translation models . Zollmann and Venugopal ( 2006 ) substituted the non-terminal X in hierarchical phrase-based model by extended syntactic categories . Zollmann and Vogel ( 2011 ) further labeled the SCFG rules with POS tags and unsupervised word classes .
@@CITATION substituted the non-terminal X in hierarchical phrase-based model by extended syntactic categories .