Question: who won season 2 of great british baking show
[{'answer': 'Joanne Wheatley'}, {'provenance': [{'wikipedia_id': '28962227', 'title': 'The Great British Bake Off', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 93, 'bleu_score': 0.555695715783725, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9998162118665151378}, 'section': 'Section::::Series overview.:Series 2 (2011).\n'}]}, {}, {'provenance': [{'wikipedia_id': '38293497', 'title': 'The Great British Bake Off (series 2)', 'section': 'Section::::Results summary.\n', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['The competition was won by Joanne Wheatley.', 'Three and a half thousand people applied for the competition, and 12 were selected. Each episode was filmed over two 14-hour days. The competition was won by Joanne Wheatley.', 'The competition was won by Joanne Wheatley.']}}]}]