Question: where does the water from the riverwalk come from
[{'answer': 'San Antonio River', 'provenance': [{'wikipedia_id': '1928836', 'title': 'San Antonio River Walk', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1928836', 'title': 'San Antonio River Walk', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 0.941591348007749, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8364881613686315235}, 'section': 'Section::::Abstract.'}]}]