你觉得北京古城最有特色的是哪一处？
如今，中轴九门独缺地安门。[{'character': '如', 'pinyin': 'ru2', 'highest pitch': 9.07, 'lowest pitch': 8.26, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '今', 'pinyin': 'jin1', 'highest pitch': 9.84, 'lowest pitch': 9.44, 'duration': 0.32, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 11.07, 'lowest pitch': 10.63, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '轴', 'pinyin': 'zhou2', 'highest pitch': 10.63, 'lowest pitch': 8.65, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '九', 'pinyin': 'jiou3', 'highest pitch': 9.91, 'lowest pitch': 4.04, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '门', 'pinyin': 'men2', 'highest pitch': 9.65, 'lowest pitch': 4.04, 'duration': 0.35, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.04}, {'character': '独', 'pinyin': 'du2', 'highest pitch': 8.3, 'lowest pitch': 7.22, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '缺', 'pinyin': 'qve1', 'highest pitch': 9.22, 'lowest pitch': 8.2, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.05}, {'character': '地', 'pinyin': 'di4', 'highest pitch': 12.95, 'lowest pitch': 8.67, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '安', 'pinyin': 'an1', 'highest pitch': 12.95, 'lowest pitch': 9.52, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '门', 'pinyin': 'men2', 'highest pitch': 9.65, 'lowest pitch': 5.1, 'duration': 0.34, 'prosody hierarchy': '#4'}]