Which NSYNC member dated Britney Spears?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q11975', 'id': 0, 'label': 'Britney Spears'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q43432', 'id': 1, 'label': 'Justin Timberlake'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q154454', 'id': 2, 'label': 'NSYNC'}, {'type': 'INTERNAL', 'name_': 'Q1403940', 'id': 3, 'label': 'No Strings Attached'}], 'links': [{'name_': 'P451', 'source': 0, 'target': 1, 'label': 'unmarried partner'}, {'name_': 'P162', 'source': 3, 'target': 1, 'label': 'producer'}, {'name_': 'P175', 'source': 3, 'target': 2, 'label': 'performer'}]}