How many studio albums have been released by Kendrick Lamar?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q31155', 'id': 0, 'label': 'MTV Europe Music Award for Best Song'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q130798', 'id': 1, 'label': 'Kendrick Lamar'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q4835467', 'id': 2, 'label': 'BET Award for Best Collaboration'}, {'type': 'INTERNAL', 'name_': 'Q148511', 'id': 3, 'label': 'Crazy in Love'}], 'links': [{'name_': 'P1346', 'source': 0, 'target': 1, 'label': 'winner'}, {'name_': 'P1411', 'source': 3, 'target': 0, 'label': 'nominated for'}, {'name_': 'P1411', 'source': 3, 'target': 2, 'label': 'nominated for'}]}