Question: how many verses of the star spangled banner
[{'answer': 'four stanzas', 'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 2, 'start_character': 467, 'end_paragraph_id': 2, 'end_character': 479, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 518, 'bleu_score': 0.7951229403501111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8100010485263554814}, 'section': 'Section::::Abstract.'}]}]