Question: which river has the largest basin in world
[{'answer': 'Amazon', 'provenance': [{'wikipedia_id': '191162', 'title': 'Drainage basin', 'start_paragraph_id': 19, 'start_character': 89, 'end_paragraph_id': 19, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Major drainage basins of the world.:Largest river basins.\n'}]}, {'provenance': [{'wikipedia_id': '191162', 'title': 'Drainage basin', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 307, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5745049745386000798}, 'section': 'Section::::Major drainage basins of the world.:Largest river basins.\n'}]}]