"我昨晚听到了火警的警报声。"
事后警方证实，该案系纵火案。[{'character': '事', 'pinyin': 'shiii4', 'highest pitch': 10.14, 'lowest pitch': 9.31, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '后', 'pinyin': 'hou4', 'highest pitch': 9.99, 'lowest pitch': 7.91, 'duration': 0.26, 'prosody hierarchy': '#2'}, {'character': '警', 'pinyin': 'jing3', 'highest pitch': 7.91, 'lowest pitch': 4.86, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 10.13, 'lowest pitch': 5.87, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 11.35, 'lowest pitch': 9.26, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '实', 'pinyin': 'shiii2', 'highest pitch': 9.26, 'lowest pitch': 5.96, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.21}, {'character': '该', 'pinyin': 'gai1', 'highest pitch': 7.72, 'lowest pitch': 7.55, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 7.83, 'lowest pitch': 7.3, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '系', 'pinyin': 'xi4', 'highest pitch': 8.34, 'lowest pitch': 7.14, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '纵', 'pinyin': 'zong4', 'highest pitch': 10.63, 'lowest pitch': 7.14, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '火', 'pinyin': 'huo3', 'highest pitch': 8.94, 'lowest pitch': 5.59, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 7.83, 'lowest pitch': 5.61, 'duration': 0.27, 'prosody hierarchy': '#4'}]