In addition, existing works have exploited the dependency path between a predicate and a candidate antecedent either by encoding such paths to the set of binary features of the words that appear in the path (Iida and Poesio, 2011) or by mining from the paths the sub-trees that effectively discriminate zero anaphoric relations (Iida et al., 2006).
both methods just focus on the dependency paths between a predicate and a candidate antecedent without exploiting other structural fragments in the dependency tree representing a target sentence, whereas our method uses the text fragments that cover the entire dependency tree.