How many different teams has Stephen Curry played for?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q5372', 'id': 1, 'label': 'basketball'}, {'type': 'INTERNAL', 'name_': 'Q19723428', 'id': 2, 'label': 'Splash Brothers'}, {'type': 'INTERNAL', 'name_': 'Q276278', 'id': 3, 'label': 'Laeta Kalogridis'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q2902978', 'id': 4, 'label': 'Davidson College'}, {'type': 'INTERNAL', 'name_': 'Q1965151', 'id': 5, 'label': 'Narcisse Ewodo'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q352159', 'id': 6, 'label': 'Stephen Curry'}, {'type': 'INTERNAL', 'name_': 'Q20744974', 'id': 7, 'label': 'Damion Lee'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P495', 'source': 1, 'target': 0, 'label': 'country of origin'}, {'name_': 'P641', 'source': 2, 'target': 1, 'label': 'sport'}, {'name_': 'P527', 'source': 2, 'target': 6, 'label': 'has part(s)'}, {'name_': 'P27', 'source': 3, 'target': 0, 'label': 'country of citizenship'}, {'name_': 'P69', 'source': 3, 'target': 4, 'label': 'educated at'}, {'name_': 'P641', 'source': 5, 'target': 1, 'label': 'sport'}, {'name_': 'P69', 'source': 5, 'target': 4, 'label': 'educated at'}, {'name_': 'P27', 'source': 7, 'target': 0, 'label': 'country of citizenship'}, {'name_': 'P641', 'source': 7, 'target': 1, 'label': 'sport'}, {'name_': 'P1038', 'source': 7, 'target': 6, 'label': 'relative'}]}