(1997), Pickering and Branigan (1998)).
we consider an undirected edge between a pair of arguments a 1 and a 2 only if they occurred together in the "a 1 and a 2 " or "a 2 and a 1 " coordination, and assign edge weights as: where − → a 1 and − → a 2 are co-occurrence vectors for a 1 and a 2 respectively.