这个坑有多大？
工人们先搬开窟窿周围的街砖，再用电钻凿开水泥板。[{'character': '工', 'pinyin': 'gong1', 'highest pitch': 11.17, 'lowest pitch': 10.35, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 11.13, 'lowest pitch': 8.75, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '们', 'pinyin': 'men5', 'highest pitch': 8.75, 'lowest pitch': 5.49, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '先', 'pinyin': 'xian1', 'highest pitch': 9.18, 'lowest pitch': 7.73, 'duration': 0.26, 'prosody hierarchy': '#1'}, {'character': '搬', 'pinyin': 'ban1', 'highest pitch': 8.74, 'lowest pitch': 7.86, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '开', 'pinyin': 'kai1', 'highest pitch': 9.1, 'lowest pitch': 8.46, 'duration': 0.21, 'prosody hierarchy': '#2'}, {'character': '窟', 'pinyin': 'ku1', 'highest pitch': 10.06, 'lowest pitch': 9.74, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '窿', 'pinyin': 'long5', 'highest pitch': 9.74, 'lowest pitch': 7.4, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '周', 'pinyin': 'zhou1', 'highest pitch': 9.8, 'lowest pitch': 7.4, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '围', 'pinyin': 'uei2', 'highest pitch': 9.69, 'lowest pitch': 6.38, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.72, 'lowest pitch': 6.82, 'duration': 0.11, 'prosody hierarchy': '#1'}, {'character': '街', 'pinyin': 'jie1', 'highest pitch': 8.46, 'lowest pitch': 6.82, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '砖', 'pinyin': 'zhuan1', 'highest pitch': 9.24, 'lowest pitch': 8.81, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '再', 'pinyin': 'zai4', 'highest pitch': 9.01, 'lowest pitch': 7.33, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 7.33, 'lowest pitch': 6.51, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '电', 'pinyin': 'dian4', 'highest pitch': 10.06, 'lowest pitch': 7.92, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '钻', 'pinyin': 'zuan4', 'highest pitch': 10.09, 'lowest pitch': 6.58, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.15}, {'character': '凿', 'pinyin': 'zao2', 'highest pitch': 6.96, 'lowest pitch': 5.34, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '开', 'pinyin': 'kai1', 'highest pitch': 9.1, 'lowest pitch': 6.96, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 8.39, 'lowest pitch': 5.65, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '泥', 'pinyin': 'ni2', 'highest pitch': 6.6, 'lowest pitch': 5.19, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '板', 'pinyin': 'ban3', 'highest pitch': 6.74, 'lowest pitch': 1.87, 'duration': 0.3, 'prosody hierarchy': '#4'}]