Question: what is the name of polygon with 7 sides
[{'answer': 'heptagon', 'provenance': [{'wikipedia_id': '365349', 'title': 'Heptagon', 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '365349', 'title': 'Heptagon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 51, 'bleu_score': 0.676778111654288, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17936340494233059764}, 'section': 'Section::::Abstract.'}]}]