Question: which is the only large river of indian desert of rajasthan
[{'answer': 'Luni River', 'provenance': [{'wikipedia_id': '31174', 'title': 'Thar Desert', 'start_paragraph_id': 4, 'start_character': 395, 'end_paragraph_id': 4, 'end_character': 405, 'bleu_score': 1.0, 'section': 'Section::::Geography.\n'}]}, {'provenance': [{'wikipedia_id': '31174', 'title': 'Thar Desert', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 522, 'bleu_score': 0.905255205027037, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3793303897164835399}, 'section': 'Section::::Geography.\n'}]}]