Question: where does the red river begin and end
[{'answer': 'Harmon County , Oklahoma'}, {'answer': 'Atchafalaya River', 'provenance': [{'wikipedia_id': '194242', 'title': 'Red River of the South', 'start_paragraph_id': 1, 'start_character': 302, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]