sentence1: lacoste-julien et al , 2006 ) created a discriminative model able to model 1-to-1 , 1-to-2 and 2-to-1 alignments for which the best results were obtained using features based on symmetric hmms trained to agree , and intersected model 4 .
sentence2: moore et al , 2006 , introduced a discriminative model of 1-to-n and m-to-1 alignments , and similarly to the best results were obtained using hmms trained to agree and intersected model 4 .