Question: who wrote the poem that became our national anthem
[{'answer': 'Francis Scott Key', 'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 1, 'start_character': 208, 'end_paragraph_id': 1, 'end_character': 225, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 545, 'bleu_score': 0.926871543660096, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3556703153549311229}, 'section': 'Section::::Abstract.'}]}]