我们需要护航直到什么时间？
两艘船在护航往香港走。[{'character': '两', 'pinyin': 'liang3', 'highest pitch': 8.32, 'lowest pitch': 7.19, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '艘', 'pinyin': 'sou1', 'highest pitch': 10.61, 'lowest pitch': 7.26, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '船', 'pinyin': 'chuan2', 'highest pitch': 10.24, 'lowest pitch': 6.91, 'duration': 0.35, 'prosody hierarchy': '#2'}, {'character': '在', 'pinyin': 'zai4', 'highest pitch': 9.79, 'lowest pitch': 7.44, 'duration': 0.27, 'prosody hierarchy': '#1'}, {'character': '护', 'pinyin': 'hu4', 'highest pitch': 10.3, 'lowest pitch': 7.96, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '航', 'pinyin': 'hang2', 'highest pitch': 9.11, 'lowest pitch': 5.82, 'duration': 0.4, 'prosody hierarchy': '#2'}, {'character': '往', 'pinyin': 'uang3', 'highest pitch': 8.8, 'lowest pitch': 5.27, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '香', 'pinyin': 'xiang1', 'highest pitch': 10.76, 'lowest pitch': 5.59, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '港', 'pinyin': 'gang2', 'highest pitch': 10.57, 'lowest pitch': 6.28, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '走', 'pinyin': 'zou3', 'highest pitch': 6.64, 'lowest pitch': 4.39, 'duration': 0.29, 'prosody hierarchy': '#4'}]