def add_edge(self, id1, id2, *args, **kwargs):
        self._properties = None
        kwargs.setdefault("base", Relation)
        return Graph.add_edge(self, id1, id2, *args, **kwargs)
Returns a Relation between two concepts (Edge subclass).
dataset/ETHPy150Open clips/pattern/pattern/graph/commonsense.py/Commonsense.add_edge