Who has sold more total albums, Pink Floyd or Led Zeppelin?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q2306', 'id': 0, 'label': 'Pink Floyd'}, {'type': 'INTERNAL', 'name_': 'Q15862', 'id': 1, 'label': 'Queen'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q193023', 'id': 2, 'label': 'Capitol Records'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q2331', 'id': 3, 'label': 'Led Zeppelin'}, {'type': 'INTERNAL', 'name_': 'Q550602', 'id': 4, 'label': 'Poison'}], 'links': [{'name_': 'P737', 'source': 1, 'target': 0, 'label': 'influenced by'}, {'name_': 'P264', 'source': 1, 'target': 2, 'label': 'record label'}, {'name_': 'P264', 'source': 4, 'target': 2, 'label': 'record label'}, {'name_': 'P737', 'source': 4, 'target': 3, 'label': 'influenced by'}]}