def addSubsequenceOfFeature(self, parentid):
        """
        This will add reciprocal triples like:
        feature <is subsequence of> parent
        parent has_subsequence feature
        :param graph:
        :param parentid:

        :return:

        """
        self.graph.addTriple(self.fid, self.globaltt['is subsequence of'], parentid)
        # this should be expected to be done in reasoning not ETL
        self.graph.addTriple(parentid, self.globaltt['has subsequence'], self.fid)

        return