How many albums did Tony Bennett and Lady Gaga make together?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q19848', 'id': 0, 'label': 'Lady Gaga'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q296729', 'id': 1, 'label': 'Tony Bennett'}, {'type': 'INTERNAL', 'name_': 'Q4120951', 'id': 2, 'label': 'Muppets Most Wanted'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q188770', 'id': 3, 'label': 'Telephone'}], 'links': [{'name_': 'P800', 'source': 0, 'target': 3, 'label': 'notable work'}, {'name_': 'P161', 'source': 2, 'target': 0, 'label': 'cast member'}, {'name_': 'P161', 'source': 2, 'target': 1, 'label': 'cast member'}]}