Question: how many german pilots died in the battle of britain
[{'answer': '325', 'provenance': [{'wikipedia_id': '57974', 'title': 'Battle of Britain', 'start_paragraph_id': 177, 'start_character': 807, 'end_paragraph_id': 177, 'end_character': 810, 'bleu_score': 1.0, 'section': 'Section::::Phases of the battle.:Day and night attacks on London: start of the Blitz.\n'}]}, {'provenance': [{'wikipedia_id': '57974', 'title': 'Battle of Britain', 'start_paragraph_id': 192, 'start_character': 0, 'end_paragraph_id': 192, 'end_character': 1344, 'bleu_score': 0.9737189824227701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9082379074577587827}, 'section': 'Section::::Attrition statistics.\n'}]}]