Question: who won in the battle of britain ww2
[{'answer': 'Britain', 'provenance': [{'wikipedia_id': '57974', 'title': 'Battle of Britain', 'start_paragraph_id': 0, 'start_character': 10, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '57974', 'title': 'Battle of Britain', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 471, 'bleu_score': 0.861758988103777, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2754417980961289442}, 'section': 'Section::::Abstract.'}]}]