昨天的空气是如何的？
昨日，省会空气污染指数为六十四，空气质量为良。[{'character': '昨', 'pinyin': 'zuo2', 'highest pitch': 8.75, 'lowest pitch': 7.79, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '日', 'pinyin': 'riii4', 'highest pitch': 9.81, 'lowest pitch': 6.46, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '省', 'pinyin': 'sheng3', 'highest pitch': 9.09, 'lowest pitch': 7.14, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '会', 'pinyin': 'huei4', 'highest pitch': 10.51, 'lowest pitch': 7.75, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '空', 'pinyin': 'kong1', 'highest pitch': 10.71, 'lowest pitch': 8.51, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '气', 'pinyin': 'qi4', 'highest pitch': 10.05, 'lowest pitch': 9.43, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '污', 'pinyin': 'u1', 'highest pitch': 10.83, 'lowest pitch': 9.43, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '染', 'pinyin': 'ran2', 'highest pitch': 10.53, 'lowest pitch': 8.45, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '指', 'pinyin': 'zhiii3', 'highest pitch': 10.04, 'lowest pitch': 4.96, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '数', 'pinyin': 'shu4', 'highest pitch': 11.25, 'lowest pitch': 5.41, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 10.28, 'lowest pitch': 6.9, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '六', 'pinyin': 'liou4', 'highest pitch': 9.76, 'lowest pitch': 7.29, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '十', 'pinyin': 'shiii2', 'highest pitch': 8.99, 'lowest pitch': 8.7, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '四', 'pinyin': 'sii4', 'highest pitch': 12.08, 'lowest pitch': 9.57, 'duration': 0.23, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.3}, {'character': '空', 'pinyin': 'kong1', 'highest pitch': 10.71, 'lowest pitch': 7.89, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '气', 'pinyin': 'qi4', 'highest pitch': 10.05, 'lowest pitch': 7.53, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '质', 'pinyin': 'zhiii4', 'highest pitch': 8.65, 'lowest pitch': 7.44, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '量', 'pinyin': 'liang4', 'highest pitch': 7.84, 'lowest pitch': 6.08, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 10.28, 'lowest pitch': 7.34, 'duration': 0.11, 'prosody hierarchy': 'null'}, {'character': '良', 'pinyin': 'liang2', 'highest pitch': 9.55, 'lowest pitch': 5.66, 'duration': 0.41, 'prosody hierarchy': '#4'}]