Question: largest underground chambers in the world at gunung mulu is
[{'answer': 'Sarawak Chamber', 'provenance': [{'wikipedia_id': '2427010', 'title': 'Sarawak Chamber', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2427010', 'title': 'Sarawak Chamber', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 281, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12161040189196366126}, 'section': 'Section::::Abstract.'}]}]