Annotation Guidelines for the Chinese Proposition Bank

The purpose of the Chinese PropBank (CPB) project is to add a layer of annotation to the hand-parsed sentences in the Chinese Treebank (CTB) (Xue et al., 2005). This layer of annotation assigns predicatespecific argument labels to the constituents in a parse tree. The arguments of each predicate in the sentence, which are limited to verbs and their nominalizations in the work we report here, receive an argument label in the form of ArgN, where N is an integer between 0 and 5. These numbered arguments represent core arguments that are defined in relation to the predicate, which is labeled as Rel. Each core argument plays a unique role with regard to the predicate and generally the total number of core arguments for each predicate does not exceed 6. The core arguments annotated for the verb N (”investigate”) in Example (1) are the NPs ́(”the police”) and ̄ (”accident”) Ï(”cause”), which are labeled as Arg0 and Arg1 respectively. The semantic role labels added to the parse tree are in bold.