最近有关长江白鳍豚的消息吗？
长江白鳍豚可能已经灭绝。[{'character': '长', 'pinyin': 'chang2', 'highest pitch': 9.3, 'lowest pitch': 8.19, 'duration': 0.33, 'prosody hierarchy': 'null'}, {'character': '江', 'pinyin': 'jiang1', 'highest pitch': 10.36, 'lowest pitch': 9.29, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '白', 'pinyin': 'bai2', 'highest pitch': 10.37, 'lowest pitch': 8.15, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '鳍', 'pinyin': 'qi2', 'highest pitch': 9.81, 'lowest pitch': 9.51, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '豚', 'pinyin': 'tuen2', 'highest pitch': 9.51, 'lowest pitch': 6.87, 'duration': 0.38, 'prosody hierarchy': '#3'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 9.08, 'lowest pitch': 7.22, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 8.62, 'lowest pitch': 6.88, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '已', 'pinyin': 'i3', 'highest pitch': 8.62, 'lowest pitch': 5.44, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '经', 'pinyin': 'jing1', 'highest pitch': 9.61, 'lowest pitch': 8.58, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '灭', 'pinyin': 'mie4', 'highest pitch': 9.82, 'lowest pitch': 5.88, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '绝', 'pinyin': 'jve2', 'highest pitch': 7.49, 'lowest pitch': 5.51, 'duration': 0.33, 'prosody hierarchy': '#4'}]