Question: the square of the period of a planet is equal to what cubed
[{'answer': 'semi-major axis', 'provenance': [{'wikipedia_id': '17553', 'title': "Kepler's laws of planetary motion", 'start_paragraph_id': 37, 'start_character': 4, 'end_paragraph_id': 37, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Formulary.:First law of Kepler (law of orbits).\n'}]}, {'provenance': [{'wikipedia_id': '17553', 'title': "Kepler's laws of planetary motion", 'start_paragraph_id': 4, 'start_character': 11, 'end_paragraph_id': 4, 'end_character': 130, 'bleu_score': 0.704530757385876, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17370452302220954999}, 'section': 'Section::::Abstract.'}]}]