To detect a coordinate structure involving a key bunsetsu, b n , we consider only a partial matrix (denoted A n ), that is, the upper right part of b n ( Figure  1).
to specify correspondences between bunsetsus in potential pre-and post-conjuncts, a path is defined as follows: where a path represents a series of elements from a non-zero element in the lowest row in A n to an element in the leftmost column in A n .