In particular, we define where W c and b c are parameters of the embedding.
we will refer to the j'th hidden state of the RNN corresponding to X (m) as h (m) j , and we obtain it according to the following formula we will effectively run an RNN over each (sequence of mentions corresponding to a) cluster X (m) in the document, and thereby generate a hidden state h (m) j corresponding to each step of each cluster in the document.