Question: who won the 2015 great british baking show
[{'answer': 'Nadiya Hussain', 'provenance': [{'wikipedia_id': '28962227', 'title': 'The Great British Bake Off', 'start_paragraph_id': 2, 'start_character': 369, 'end_paragraph_id': 2, 'end_character': 383, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]