In SMT, it is known that incorporating syntactic constituents of the source language into the models improves word alignment (Yamada and Knight, 2001) and translation accuracy (Liu et al., 2006;Neubig and Duh, 2014).
effects of the proposed beam search Table 4 shows the results on the development data of proposed method with BlackOut (K = 2000) by the simple beam search and our proposed beam search.