Question: where did the idea of helicopters come from
[{'answer': 'China', 'provenance': [{'wikipedia_id': '8286923', 'title': 'Helicopter', 'start_paragraph_id': 6, 'start_character': 54, 'end_paragraph_id': 6, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::History.:Early design.\n'}]}, {'provenance': [{'wikipedia_id': '8286923', 'title': 'Helicopter', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 442, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11112643660771114842}, 'section': 'Section::::History.:Early design.\n'}]}]