In the tagging phase, instead of using (4)-(6), the input can be constructed simply as ipt t0i = g t0i 1 OPT(0i); 10where i = 1 ; 1 11 ; l , and OPT(0i) means the output of the tagger for the ith word before the target word.
in the training process, the output of the tagger is not always correct and cannot be fed back to the inputs directly.