code: def tag_syntax_vislcg3(self):
          
          if not self.__syntactic_parser or not isinstance(self.__syntactic_parser, VISLCG3Parser):
              self.__syntactic_parser = VISLCG3Parser()
          return self.tag_syntax()
docs: Changes default syntactic parser to VISLCG3Parser, performs syntactic analysis,
              and stores the results in the layer named LAYER_VISLCG3.