How many Olympic gold medals does Lionel Messi have?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q19180675', 'id': 0, 'label': 'Small Brockhaus and Efron Encyclopedic Dictionary'}, {'type': 'INTERNAL', 'name_': 'Q29', 'id': 1, 'label': 'Spain'}, {'type': 'INTERNAL', 'name_': 'Q2736', 'id': 2, 'label': 'soccer'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q5389', 'id': 3, 'label': 'Olympic Games'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q615', 'id': 4, 'label': 'Lionel Messi'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1808491', 'id': 5, 'label': 'Trofeo Alfredo Di Stéfano'}, {'type': 'INTERNAL', 'name_': 'Q5390754', 'id': 6, 'label': 'Programa ADO'}], 'links': [{'name_': 'P1343', 'source': 2, 'target': 0, 'label': 'described by source'}, {'name_': 'P1343', 'source': 3, 'target': 0, 'label': 'described by source'}, {'name_': 'P27', 'source': 4, 'target': 1, 'label': 'country of citizenship'}, {'name_': 'P641', 'source': 4, 'target': 2, 'label': 'sport'}, {'name_': 'P166', 'source': 4, 'target': 5, 'label': 'award received'}, {'name_': 'P17', 'source': 5, 'target': 1, 'label': 'country'}, {'name_': 'P641', 'source': 5, 'target': 2, 'label': 'sport'}, {'name_': 'P17', 'source': 6, 'target': 1, 'label': 'country'}, {'name_': 'P793', 'source': 6, 'target': 3, 'label': 'significant event'}]}