Question: who developed most of our current understanding of planetary motion
[{'answer': 'Johannes Kepler', 'provenance': [{'wikipedia_id': '22498', 'title': 'Orbit', 'start_paragraph_id': 5, 'start_character': 73, 'end_paragraph_id': 5, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '22498', 'title': 'Orbit', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1181, 'bleu_score': 0.954754177241906, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3280094020633271900}, 'section': 'Section::::History.\n'}]}]