Question: who was the famous indian astronomer who discovered that earth revolves on an axis
[{'answer': 'Aryabhata', 'provenance': [{'wikipedia_id': '2781944', 'title': 'Indian astronomy', 'start_paragraph_id': 3, 'start_character': 55, 'end_paragraph_id': 3, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]