为什么女王没有参加这次会议？
这是自一九七三年来，女王首次缺席该会议。[{'character': '这', 'pinyin': 'zhe4', 'highest pitch': 10.71, 'lowest pitch': 9.89, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 9.89, 'lowest pitch': 8.87, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '自', 'pinyin': 'zii4', 'highest pitch': 9.24, 'lowest pitch': 8.35, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 10.42, 'lowest pitch': 8.28, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '九', 'pinyin': 'jiou3', 'highest pitch': 9.57, 'lowest pitch': 5.72, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '七', 'pinyin': 'qi1', 'highest pitch': 9.62, 'lowest pitch': 5.72, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '三', 'pinyin': 'san1', 'highest pitch': 10.94, 'lowest pitch': 10.16, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '年', 'pinyin': 'nian2', 'highest pitch': 10.16, 'lowest pitch': 6.68, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '来', 'pinyin': 'lai2', 'highest pitch': 7.49, 'lowest pitch': 5.95, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.15}, {'character': '女', 'pinyin': 'nv3', 'highest pitch': 8.74, 'lowest pitch': 7.46, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '王', 'pinyin': 'uang2', 'highest pitch': 9.77, 'lowest pitch': 7.4, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '首', 'pinyin': 'shou3', 'highest pitch': 9.77, 'lowest pitch': 5.61, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '次', 'pinyin': 'cii4', 'highest pitch': 10.78, 'lowest pitch': 5.61, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '缺', 'pinyin': 'qve1', 'highest pitch': 9.49, 'lowest pitch': 8.54, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '席', 'pinyin': 'xi2', 'highest pitch': 8.59, 'lowest pitch': 6.65, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '该', 'pinyin': 'gai1', 'highest pitch': 8.65, 'lowest pitch': 7.89, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '会', 'pinyin': 'huei4', 'highest pitch': 8.75, 'lowest pitch': 7.0, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '议', 'pinyin': 'i4', 'highest pitch': 7.0, 'lowest pitch': 5.0, 'duration': 0.2, 'prosody hierarchy': '#4'}]