那么，请告诉我宫颈癌的病因是什么？
玛依努尔说，宫颈癌是迄今唯一研究出病因的癌症。[{'character': '玛', 'pinyin': 'ma3', 'highest pitch': 8.47, 'lowest pitch': 7.34, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '依', 'pinyin': 'i1', 'highest pitch': 10.82, 'lowest pitch': 8.47, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '努', 'pinyin': 'nu2', 'highest pitch': 10.54, 'lowest pitch': 8.78, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '尔', 'pinyin': 'er3', 'highest pitch': 10.59, 'lowest pitch': 5.95, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '说', 'pinyin': 'shuo1', 'highest pitch': 8.73, 'lowest pitch': 7.86, 'duration': 0.32, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.34}, {'character': '宫', 'pinyin': 'gong1', 'highest pitch': 11.63, 'lowest pitch': 11.06, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '颈', 'pinyin': 'jing3', 'highest pitch': 11.43, 'lowest pitch': 5.41, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '癌', 'pinyin': 'ai2', 'highest pitch': 13.2, 'lowest pitch': 5.39, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 9.36, 'lowest pitch': 7.05, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '迄', 'pinyin': 'qi4', 'highest pitch': 8.51, 'lowest pitch': 6.47, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '今', 'pinyin': 'jin1', 'highest pitch': 8.71, 'lowest pitch': 6.47, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '唯', 'pinyin': 'uei2', 'highest pitch': 9.16, 'lowest pitch': 6.5, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 10.82, 'lowest pitch': 8.4, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '研', 'pinyin': 'ian2', 'highest pitch': 8.4, 'lowest pitch': 5.99, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '究', 'pinyin': 'jiou1', 'highest pitch': 8.22, 'lowest pitch': 7.07, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '出', 'pinyin': 'chu1', 'highest pitch': 9.09, 'lowest pitch': 7.79, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '病', 'pinyin': 'bing4', 'highest pitch': 10.01, 'lowest pitch': 7.96, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '因', 'pinyin': 'in1', 'highest pitch': 10.47, 'lowest pitch': 8.07, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 13.2, 'lowest pitch': 9.25, 'duration': 0.11, 'prosody hierarchy': '#1'}, {'character': '癌', 'pinyin': 'ai2', 'highest pitch': 13.2, 'lowest pitch': 5.51, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '症', 'pinyin': 'zheng4', 'highest pitch': 10.39, 'lowest pitch': 7.37, 'duration': 0.26, 'prosody hierarchy': '#4'}]