f j is associated with a hidden alignment variable a j whose value ranges over the word positions in the corresponding source sentence.
the joint distribution of the Model-1 variables is given by the following generative model 3 : P (E, F, A; t) = s P (e)P (a|e)P (f |a, e; t) (1) In the proposed Bayesian setting, we treat t as a random variable with a prior P (t).