Who was the 2011 Nascar cup series champion and has the nickname "Happy?"?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q739092', 'id': 0, 'label': 'Kevin Harvick'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q233929', 'id': 1, 'label': 'NASCAR'}, {'type': 'INTERNAL', 'name_': 'Q15098782', 'id': 2, 'label': '2014 NASCAR Sprint Cup Series'}], 'links': [{'name_': 'P1346', 'source': 2, 'target': 0, 'label': 'winner'}, {'name_': 'P664', 'source': 2, 'target': 1, 'label': 'organizer'}]}