... re-trieval using dependency relations. In SIGIR 2005,Salvador, Brazil, August.Radu Florian, Hani Hassan, Abraham Ittycheriah,Hongyan Jing, Nanda Kambhatla, Xiaoqiang Luo,Nicholas Nicolov, and Salim ... resignation of Khaddam was abrupt” as an example. In particular, the “depth” features at-tempt to capture the “importance” the dependencymatch, as measured by the depth of the ancestor in the ... 1. As a baseline, we trained and tested a model using only the lexical-matching features. We then trainedand tested models using only the low-level featuresand all features. Figure 3 shows the...