Question: who proved that mar’s orbit is elliptical not circular
[{'answer': 'Nicolaus Copernicus', 'provenance': [{'wikipedia_id': '2748665', 'title': 'Copernican Revolution', 'start_paragraph_id': 1, 'start_character': 283, 'end_paragraph_id': 1, 'end_character': 302, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2748665', 'title': 'Copernican Revolution', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 454, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5192228306041196405}, 'section': 'Section::::Abstract.'}]}]