Question: when was the battle of britain film made
[{'answer': '1969', 'provenance': [{'wikipedia_id': '240483', 'title': 'Battle of Britain (film)', 'start_paragraph_id': 1, 'start_character': 23, 'end_paragraph_id': 1, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '240483', 'title': 'Battle of Britain (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 577, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10853522245614078089}, 'section': 'Section::::Abstract.'}]}]