Question: who came up with the idea of gravity
[{'answer': 'Aristotle', 'provenance': [{'wikipedia_id': '4387043', 'title': 'History of gravitational theory', 'start_paragraph_id': 2, 'start_character': 18, 'end_paragraph_id': 2, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4387043', 'title': 'History of gravitational theory', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 643, 'bleu_score': 0.9823771291847391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5499470027441459441}, 'section': 'Section::::Antiquity.:Greece.\n'}]}]