Question: where does the water come from for victoria falls
[{'answer': 'the Zambezi River', 'provenance': [{'wikipedia_id': '192485', 'title': 'Victoria Falls', 'start_paragraph_id': 1, 'start_character': 103, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '192485', 'title': 'Victoria Falls', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 0.813666394221037, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14562188134793668173}, 'section': 'Section::::Abstract.'}]}]