这座桥群里有多少个闸门？
新河闸桥群中包括中闸、麻糍闸、北闸、下卢闸四个闸。[{'character': '新', 'pinyin': 'xin1', 'highest pitch': 11.33, 'lowest pitch': 10.75, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '河', 'pinyin': 'he2', 'highest pitch': 10.79, 'lowest pitch': 8.73, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 8.81, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '桥', 'pinyin': 'qiao2', 'highest pitch': 9.59, 'lowest pitch': 8.43, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '群', 'pinyin': 'qvn2', 'highest pitch': 9.41, 'lowest pitch': 6.65, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 10.82, 'lowest pitch': 7.86, 'duration': 0.25, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.07}, {'character': '包', 'pinyin': 'bao1', 'highest pitch': 8.45, 'lowest pitch': 7.55, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '括', 'pinyin': 'kuo4', 'highest pitch': 8.67, 'lowest pitch': 6.49, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 10.82, 'lowest pitch': 10.17, 'duration': 0.29, 'prosody hierarchy': 'null'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 6.41, 'duration': 0.32, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.16}, {'character': '麻', 'pinyin': 'ma2', 'highest pitch': 10.74, 'lowest pitch': 7.72, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '糍', 'pinyin': 'cii2', 'highest pitch': 9.37, 'lowest pitch': 6.95, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 6.26, 'duration': 0.32, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.14}, {'character': '北', 'pinyin': 'bei3', 'highest pitch': 9.09, 'lowest pitch': 5.2, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 5.2, 'duration': 0.34, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.1}, {'character': '下', 'pinyin': 'xia4', 'highest pitch': 11.46, 'lowest pitch': 9.14, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '卢', 'pinyin': 'lu2', 'highest pitch': 9.14, 'lowest pitch': 6.04, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 6.11, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '四', 'pinyin': 'sii4', 'highest pitch': 8.82, 'lowest pitch': 6.67, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '个', 'pinyin': 'ge4', 'highest pitch': 7.26, 'lowest pitch': 6.23, 'duration': 0.1, 'prosody hierarchy': 'null'}, {'character': '闸', 'pinyin': 'zha2', 'highest pitch': 9.61, 'lowest pitch': 5.95, 'duration': 0.31, 'prosody hierarchy': '#4'}]