Question: who won the great british bake off season 2
[{'answer': 'Jo', 'provenance': [{'wikipedia_id': '38293497', 'title': 'The Great British Bake Off (series 2)', 'start_paragraph_id': 2, 'start_character': 158, 'end_paragraph_id': 2, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]