Question: where does the water from the la river come from
[{'answer': 'Bell Creek', 'provenance': [{'wikipedia_id': '180865', 'title': 'Los Angeles River', 'start_paragraph_id': 5, 'start_character': 93, 'end_paragraph_id': 5, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::Course.\n'}]}, {'answer': 'Arroyo Calabasas', 'provenance': [{'wikipedia_id': '180865', 'title': 'Los Angeles River', 'start_paragraph_id': 5, 'start_character': 108, 'end_paragraph_id': 5, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::Course.\n'}]}]