Question: what is the shape of earth's orbit around the sun
[{'answer': 'ellipse', 'provenance': [{'wikipedia_id': '878461', 'title': "Earth's orbit", 'start_paragraph_id': 12, 'start_character': 135, 'end_paragraph_id': 12, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Events in the orbit.\n'}]}, {'provenance': [{'wikipedia_id': '878461', 'title': "Earth's orbit", 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 702, 'bleu_score': 0.984188478234951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2899323829208157817}, 'section': 'Section::::Events in the orbit.\n'}]}]