The main issue in this type of research is how to assign likelihoods to a single linguistic structure generated by a grammar.
instead of learning two output values "T(true)" or "F(false)" for the dependency between two bunsetsus, three output values are used for learning: the bunsetsu i is "bynd (dependent on a bunsetsu beyond j)", "dpnd (dependent on the bunsetsu j)" or "btwn (dependent on a bunsetsu between i and j)".