Question: where is the mark twain national forest located
[{'answer': 'southern half of Missouri', 'provenance': [{'wikipedia_id': '2627849', 'title': 'Mark Twain National Forest', 'start_paragraph_id': 1, 'start_character': 75, 'end_paragraph_id': 1, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2627849', 'title': 'Mark Twain National Forest', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 671, 'bleu_score': 0.8466091564347231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2490554759300296505}, 'section': 'Section::::Abstract.'}]}]