Question: when was it discovered that the sun rotates
[{'answer': '1630', 'provenance': [{'wikipedia_id': '1359541', 'title': 'Solar rotation', 'start_paragraph_id': 18, 'start_character': 1052, 'end_paragraph_id': 18, 'end_character': 1056, 'bleu_score': 1.0, 'section': 'Section::::Using sunspots to measure rotation.\n'}]}, {'provenance': [{'wikipedia_id': '1359541', 'title': 'Solar rotation', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1253, 'bleu_score': 0.9779485965801171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8416049767243821564}, 'section': 'Section::::Using sunspots to measure rotation.\n'}]}]