Which baseball player has the most career home runs?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q5369', 'id': 0, 'label': 'baseball'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q534851', 'id': 1, 'label': 'home run'}, {'type': 'INTERNAL', 'name_': 'Q7502395', 'id': 2, 'label': "Shot Heard 'Round the World"}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q3405083', 'id': 3, 'label': 'British baseball'}], 'links': [{'name_': 'P641', 'source': 2, 'target': 0, 'label': 'sport'}, {'name_': 'P31', 'source': 2, 'target': 1, 'label': 'instance of'}, {'name_': 'P1889', 'source': 3, 'target': 0, 'label': 'different from'}]}