The correlation between the i-th translation equivalent of target word x, denoted as y(i), and the j-th associated word x'(j) is defined as where MI(x, x'(j)) is the mutual information between x and x'(j), and PL(y(i), x'(j)) is the plausibility factor for y(i) given by x'(j).
the total number of selected target words was 12,848.