Many traditional, feature-based relation classification models extract features from both sequences and parse trees (Zhou et al., 2005).
aCE04 defines the same 7 coarse-grained entity types as aCE05 (Doddington et al., 2004), but de-fines 7 coarse-grained relation types: PYS, PER-SOC, Employment / Membership / Subsidiary (EMP-ORG), aRT, PER/ORG affiliation (Other-aFF), GPE affiliation (GPE-aFF), and Discourse (DISC).