小心！有人在背后！
昏暗中，只见一名男子从张建强的背后，抡起铁锤猛砸。[{'character': '昏', 'pinyin': 'huen1', 'highest pitch': 10.8, 'lowest pitch': 10.53, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '暗', 'pinyin': 'an4', 'highest pitch': 10.74, 'lowest pitch': 8.63, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 10.06, 'lowest pitch': 8.63, 'duration': 0.24, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.17}, {'character': '只', 'pinyin': 'zhiii3', 'highest pitch': 7.15, 'lowest pitch': 5.91, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '见', 'pinyin': 'jian4', 'highest pitch': 10.56, 'lowest pitch': 5.91, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i4', 'highest pitch': 7.99, 'lowest pitch': 7.07, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '名', 'pinyin': 'ming2', 'highest pitch': 8.33, 'lowest pitch': 6.6, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '男', 'pinyin': 'nan2', 'highest pitch': 8.6, 'lowest pitch': 6.22, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '子', 'pinyin': 'zii3', 'highest pitch': 8.53, 'lowest pitch': 3.91, 'duration': 0.25, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.11}, {'character': '从', 'pinyin': 'cong2', 'highest pitch': 7.47, 'lowest pitch': 6.09, 'duration': 0.31, 'prosody hierarchy': '#1'}, {'character': '张', 'pinyin': 'zhang1', 'highest pitch': 10.51, 'lowest pitch': 7.47, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '建', 'pinyin': 'jian4', 'highest pitch': 10.56, 'lowest pitch': 8.09, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '强', 'pinyin': 'qiang2', 'highest pitch': 8.09, 'lowest pitch': 5.84, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 8.36, 'lowest pitch': 6.55, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '背', 'pinyin': 'bei4', 'highest pitch': 8.83, 'lowest pitch': 7.34, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '后', 'pinyin': 'hou4', 'highest pitch': 8.23, 'lowest pitch': 5.75, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.25}, {'character': '抡', 'pinyin': 'luen1', 'highest pitch': 8.89, 'lowest pitch': 8.53, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '起', 'pinyin': 'qi2', 'highest pitch': 8.89, 'lowest pitch': 7.14, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 7.92, 'lowest pitch': 5.22, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '锤', 'pinyin': 'chuei2', 'highest pitch': 8.4, 'lowest pitch': 5.22, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '猛', 'pinyin': 'meng3', 'highest pitch': 9.0, 'lowest pitch': 4.97, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '砸', 'pinyin': 'za2', 'highest pitch': 8.34, 'lowest pitch': 5.16, 'duration': 0.35, 'prosody hierarchy': '#4'}]