What kind of music did Black Sabbath play?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q5', 'id': 0, 'label': 'human'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q47670', 'id': 1, 'label': 'Black Sabbath'}, {'type': 'INTERNAL', 'name_': 'Q310752', 'id': 2, 'label': 'Geezer Butler'}, {'type': 'INTERNAL', 'name_': 'Q2293686', 'id': 3, 'label': 'list of Black Sabbath and Heaven & Hell members'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q7855671', 'id': 4, 'label': 'Category:Black Sabbath members'}], 'links': [{'name_': 'P31', 'source': 2, 'target': 0, 'label': 'instance of'}, {'name_': 'P463', 'source': 2, 'target': 1, 'label': 'member of'}, {'name_': 'P360', 'source': 3, 'target': 0, 'label': 'is a list of'}, {'name_': 'P1754', 'source': 3, 'target': 4, 'label': 'category related to list'}]}