Question: who said sun is the center of the solar system
[{'answer': 'Aristarchus of Samos', 'provenance': [{'wikipedia_id': '244588', 'title': 'Heliocentrism', 'start_paragraph_id': 1, 'start_character': 325, 'end_paragraph_id': 1, 'end_character': 345, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '244588', 'title': 'Heliocentrism', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 509, 'bleu_score': 0.9458134147569861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10972950168827965009}, 'section': 'Section::::Abstract.'}]}]