Among them, feature-based methods (Kambhatla 2004;Zhou et al., 2005) achieve certain success by employing a large amount of diverse linguistic features, varying from lexical knowledge, e ntityrelated information to syntactic parse trees, dependency trees and semantic information.
for example, "got married" is critical to determine the relationship between "John" and "Mary" in the sentence "John and Mary got married… " as shown in figure 1(e), and the information contained in SPT ("John and Mary") is not enough to determine their relationship.