Question: who won the battle of britain in world war 2
[{'answer': 'British victory', 'provenance': [{'wikipedia_id': '57974', 'title': 'Battle of Britain', 'start_paragraph_id': 211, 'start_character': 4, 'end_paragraph_id': 211, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Aftermath.\n'}]}]