As far as negation scope finding considered, the negation signal can be regarded as the predicate 4 , while the scope of the negation signal can be mapped into several constituents which are negated and thus can be regarded as the arguments of the negation signal.
given a negation signal and its negation scope which covers word m , …, word n , we adopt the following two heuristic rules to map the negation scope of the negation signal into several constituents which can be deemed as its arguments in the given parse tree.