噢，这样看来他们是意外中毒了。
警方初步调查，夫妻俩死于一氧化碳中毒。[{'character': '警', 'pinyin': 'jing3', 'highest pitch': 8.08, 'lowest pitch': 6.51, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 9.35, 'lowest pitch': 6.51, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '初', 'pinyin': 'chu1', 'highest pitch': 10.53, 'lowest pitch': 9.35, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '步', 'pinyin': 'bu4', 'highest pitch': 10.5, 'lowest pitch': 8.87, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '调', 'pinyin': 'diao4', 'highest pitch': 9.84, 'lowest pitch': 6.91, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '查', 'pinyin': 'cha2', 'highest pitch': 6.91, 'lowest pitch': 5.7, 'duration': 0.36, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.26}, {'character': '夫', 'pinyin': 'fu1', 'highest pitch': 8.7, 'lowest pitch': 7.22, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '妻', 'pinyin': 'qi1', 'highest pitch': 8.69, 'lowest pitch': 7.22, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '俩', 'pinyin': 'lia2', 'highest pitch': 8.28, 'lowest pitch': 6.08, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '死', 'pinyin': 'sii3', 'highest pitch': 7.98, 'lowest pitch': 5.43, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '于', 'pinyin': 'v2', 'highest pitch': 6.87, 'lowest pitch': 5.13, 'duration': 0.2, 'prosody hierarchy': '#2'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 9.98, 'lowest pitch': 6.87, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '氧', 'pinyin': 'iang3', 'highest pitch': 10.15, 'lowest pitch': 6.29, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '化', 'pinyin': 'hua4', 'highest pitch': 8.84, 'lowest pitch': 6.29, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '碳', 'pinyin': 'tan4', 'highest pitch': 8.45, 'lowest pitch': 7.26, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '中', 'pinyin': 'zhong4', 'highest pitch': 9.18, 'lowest pitch': 6.54, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '毒', 'pinyin': 'du2', 'highest pitch': 8.31, 'lowest pitch': 5.4, 'duration': 0.32, 'prosody hierarchy': '#4'}]