Thus we use the preextracted general knowledge to guarantee that the fusion of coarse memories for each passage word will only involve a precise subset of the other passage words.
for each passage word p i , whose coarse memory is g p i , to perform the fusion of coarse memories, first recall that we have extracted a set E p i , which includes the positions of the other passage words that p i is semantically connected to, thus by gathering the columns in G whose indexes are given by E p i , we obtain the matching coarse memories Z ∈ R d×|Ep i | .