Question: south american river also known as rio itenez in bolivia
[{'answer': 'Guaporé River', 'provenance': [{'wikipedia_id': '5853275', 'title': 'Guaporé River', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]