Question: where is area code 931 located in usa
[{'answer': 'Middle Tennessee', 'provenance': [{'wikipedia_id': '5547805', 'title': 'Area code 931', 'start_paragraph_id': 1, 'start_character': 108, 'end_paragraph_id': 1, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5547805', 'title': 'Area code 931', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 209, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18266810584531812620}, 'section': 'Section::::Abstract.'}]}]