公墓的周围有什么安全措施吗？
陈富乐介绍，公墓有两道铁丝网，最里面是一圈铁栅栏。[{'character': '陈', 'pinyin': 'chen2', 'highest pitch': 8.99, 'lowest pitch': 7.45, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '富', 'pinyin': 'fu4', 'highest pitch': 10.84, 'lowest pitch': 8.99, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '乐', 'pinyin': 'le4', 'highest pitch': 11.15, 'lowest pitch': 8.11, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '介', 'pinyin': 'jie4', 'highest pitch': 8.79, 'lowest pitch': 7.25, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '绍', 'pinyin': 'shao4', 'highest pitch': 7.84, 'lowest pitch': 5.46, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.33}, {'character': '公', 'pinyin': 'gong1', 'highest pitch': 11.07, 'lowest pitch': 10.27, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '墓', 'pinyin': 'mu4', 'highest pitch': 11.16, 'lowest pitch': 8.59, 'duration': 0.22, 'prosody hierarchy': '#2'}, {'character': '有', 'pinyin': 'iou2', 'highest pitch': 8.04, 'lowest pitch': 7.34, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '两', 'pinyin': 'liang3', 'highest pitch': 8.21, 'lowest pitch': 5.22, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '道', 'pinyin': 'dao4', 'highest pitch': 7.49, 'lowest pitch': 6.42, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 9.5, 'lowest pitch': 4.73, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '丝', 'pinyin': 'sii1', 'highest pitch': 10.13, 'lowest pitch': 5.29, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '网', 'pinyin': 'uang3', 'highest pitch': 9.86, 'lowest pitch': 3.3, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 11.48, 'lowest pitch': 10.45, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '里', 'pinyin': 'li3', 'highest pitch': 10.45, 'lowest pitch': 5.41, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '面', 'pinyin': 'mian4', 'highest pitch': 7.41, 'lowest pitch': 5.37, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 8.45, 'lowest pitch': 7.3, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i4', 'highest pitch': 7.3, 'lowest pitch': 6.4, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '圈', 'pinyin': 'qvan1', 'highest pitch': 9.5, 'lowest pitch': 6.4, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 9.5, 'lowest pitch': 4.03, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '栅', 'pinyin': 'zha4', 'highest pitch': 10.21, 'lowest pitch': 8.63, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '栏', 'pinyin': 'lan2', 'highest pitch': 8.63, 'lowest pitch': 4.32, 'duration': 0.3, 'prosody hierarchy': '#4'}]