For example, consider the sentence in In order to model the validity of the connection points, we represent each connection point as the concatenation of a forward and reverse LSTMs centered around that point.
for the spans in Figure 3 the two connection points are represented as: Formally, assuming words w 1:n in a sentence with coordination at position k and conjuncts w i:j and w l:m , 5 the connection points are between w 1:j and w m+1:n ; and between w 1:i−1 and w l:n .