那么火是如何开始的呢？
大约晚上十一点左右，火开始向三十四楼蔓延。[{'character': '大', 'pinyin': 'da4', 'highest pitch': 8.89, 'lowest pitch': 7.43, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '约', 'pinyin': 've1', 'highest pitch': 8.82, 'lowest pitch': 7.39, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '晚', 'pinyin': 'uan3', 'highest pitch': 8.16, 'lowest pitch': 5.08, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 7.55, 'lowest pitch': 5.71, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '十', 'pinyin': 'shiii2', 'highest pitch': 10.03, 'lowest pitch': 8.56, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 11.32, 'lowest pitch': 10.03, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '点', 'pinyin': 'dian2', 'highest pitch': 11.1, 'lowest pitch': 7.01, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '左', 'pinyin': 'zuo3', 'highest pitch': 7.28, 'lowest pitch': 4.95, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '右', 'pinyin': 'iou4', 'highest pitch': 6.78, 'lowest pitch': 4.54, 'duration': 0.23, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.24}, {'character': '火', 'pinyin': 'huo3', 'highest pitch': 7.24, 'lowest pitch': 5.11, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '开', 'pinyin': 'kai1', 'highest pitch': 8.65, 'lowest pitch': 7.69, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '始', 'pinyin': 'shiii3', 'highest pitch': 8.65, 'lowest pitch': 5.68, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '向', 'pinyin': 'xiang4', 'highest pitch': 7.58, 'lowest pitch': 6.09, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '三', 'pinyin': 'san1', 'highest pitch': 9.53, 'lowest pitch': 6.97, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '十', 'pinyin': 'shiii2', 'highest pitch': 10.03, 'lowest pitch': 9.1, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '四', 'pinyin': 'sii4', 'highest pitch': 10.78, 'lowest pitch': 9.63, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '楼', 'pinyin': 'lou2', 'highest pitch': 9.63, 'lowest pitch': 6.12, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '蔓', 'pinyin': 'man4', 'highest pitch': 7.18, 'lowest pitch': 5.97, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '延', 'pinyin': 'ian2', 'highest pitch': 6.1, 'lowest pitch': 5.17, 'duration': 0.38, 'prosody hierarchy': '#4'}]