4. The method of claim 1 , wherein step 2 further comprises: Step 2.1: For each sentence, using multiple parsing models to produce several parse trees; and Step 2.2: For each predicate, performing monolingual SRL multiple times to obtain several argument candidates, each time using one parse tree generated in Step 2.1.
6. The method of claim 4 , wherein in Step 2.2, the monolingual SRL system is based on maximum entropy classifiers, the input to the monolingual SRL system is a syntactic parse tree, and the maximum entropy classifiers are employed to label each predicate in the input parse tree and return the SRL result.