Question: when was the first plane used in war
[{'answer': '1911', 'provenance': [{'wikipedia_id': '406757', 'title': 'Aerial warfare', 'start_paragraph_id': 4, 'start_character': 46, 'end_paragraph_id': 4, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '406757', 'title': 'Aerial warfare', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 299, 'bleu_score': 0.7687004838800071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10303934154948469522}, 'section': 'Section::::History.\n'}]}]