Question: where does the rio grande start and finish
[{'answer': 'Gulf of Mexico', 'provenance': [{'wikipedia_id': '43005', 'title': 'Rio Grande', 'start_paragraph_id': 1, 'start_character': 246, 'end_paragraph_id': 1, 'end_character': 260, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'San Juan Mountains , Rio Grande National Forest , Colorado'}]