How many teams has Shohei Ohtani played for?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q6581097', 'id': 0, 'label': 'male'}, {'type': 'INTERNAL', 'name_': 'Q17', 'id': 1, 'label': 'Japan'}, {'type': 'INTERNAL', 'name_': 'Q324023', 'id': 2, 'label': '2012 Nippon Professional Baseball season'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1146127', 'id': 3, 'label': 'Nippon Professional Baseball'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q4391858', 'id': 4, 'label': 'Shohei Ohtani'}, {'type': 'INTERNAL', 'name_': 'Q11553893', 'id': 5, 'label': 'Ryō Kawamura'}], 'links': [{'name_': 'P17', 'source': 2, 'target': 1, 'label': 'country'}, {'name_': 'P3450', 'source': 2, 'target': 3, 'label': 'sports season of league or competition'}, {'name_': 'P21', 'source': 4, 'target': 0, 'label': 'sex or gender'}, {'name_': 'P27', 'source': 4, 'target': 1, 'label': 'country of citizenship'}, {'name_': 'P21', 'source': 5, 'target': 0, 'label': 'sex or gender'}, {'name_': 'P27', 'source': 5, 'target': 1, 'label': 'country of citizenship'}, {'name_': 'P101', 'source': 5, 'target': 3, 'label': 'field of work'}]}