Using θ * , we can calculate the semantic gap for any possible span for w n , such as < i, j m , j n >, as follows: where p s and p t are the word vector representation of e i and c jn jm , respectively.
the semantic gap feature score of the word w n = c jn jm is derived as follows: Because the output scores of each sub-model described above are not probabilistic and they vary by orders of magnitude, we must first normalize the output scores of each sub-model.