def __init__(self, store='default', identifier=None):
        super(ConjunctiveGraph, self).__init__(store, identifier=identifier)
        assert self.store.context_aware, ("ConjunctiveGraph must be backed by"
                                          " a context aware store.")
        self.context_aware = True
        self.default_union = True # Conjunctive!
        self.default_context = Graph(store=self.store,
                                     identifier=identifier or BNode())
dataset/ETHPy150Open RDFLib/rdflib/rdflib/graph.py/ConjunctiveGraph.__init__/original