你为什么要这么做？
保安用手掐住记者脖子抢相机。[{'character': '保', 'pinyin': 'bao3', 'highest pitch': 8.68, 'lowest pitch': 6.86, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '安', 'pinyin': 'an1', 'highest pitch': 11.02, 'lowest pitch': 9.39, 'duration': 0.28, 'prosody hierarchy': '#2'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 11.11, 'lowest pitch': 9.47, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '手', 'pinyin': 'shou3', 'highest pitch': 9.6, 'lowest pitch': 3.98, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.03}, {'character': '掐', 'pinyin': 'qia1', 'highest pitch': 7.85, 'lowest pitch': 6.45, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '住', 'pinyin': 'zhu4', 'highest pitch': 7.4, 'lowest pitch': 6.45, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '记', 'pinyin': 'ji4', 'highest pitch': 8.07, 'lowest pitch': 6.53, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '者', 'pinyin': 'zhe3', 'highest pitch': 7.07, 'lowest pitch': 4.84, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '脖', 'pinyin': 'bo2', 'highest pitch': 7.15, 'lowest pitch': 5.65, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '子', 'pinyin': 'zii5', 'highest pitch': 8.74, 'lowest pitch': 7.15, 'duration': 0.15, 'prosody hierarchy': '#2'}, {'character': '抢', 'pinyin': 'qiang3', 'highest pitch': 7.42, 'lowest pitch': 5.55, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '相', 'pinyin': 'xiang4', 'highest pitch': 7.68, 'lowest pitch': 6.45, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 9.01, 'lowest pitch': 6.45, 'duration': 0.26, 'prosody hierarchy': '#4'}]