It segments a word sequence {w 1 , w 2 , w 3 } into a phrase sequence {w 1 , w 2 w 3 } after performing composition (Mohri, 2009) with the target L w language model (see Figure 3(b1 & b2)) 3 .
prior to phrasal reordering, the segmentation model p (w K 1 |w J 1 ) implemented by a segmentation WFST S w is applied to segment a word sequence w J 1 in the L w language model into a phrase sequence {w 1 ,w 2 , ...,w K }.