Who was the quarterback of the team that won Super Bowl 40?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q32096', 'id': 0, 'label': 'Super Bowl'}, {'type': 'INTERNAL', 'name_': 'Q597607', 'id': 1, 'label': 'Super Bowl XLI'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q904928', 'id': 2, 'label': 'Super Bowl XL'}], 'links': [{'name_': 'P31', 'source': 1, 'target': 0, 'label': 'instance of'}, {'name_': 'P155', 'source': 1, 'target': 2, 'label': 'follows'}]}