Question: who wins season 2 of great british baking show
[{'answer': 'Joanne Wheatley', 'provenance': [{'wikipedia_id': '28962227', 'title': 'The Great British Bake Off', 'start_paragraph_id': 2, 'start_character': 305, 'end_paragraph_id': 2, 'end_character': 320, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]