你知道谁是美国战果最多的狙击手吗？
美国战果最多的狙击手凯尔。[{'character': '美', 'pinyin': 'mei3', 'highest pitch': 8.97, 'lowest pitch': 6.95, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '国', 'pinyin': 'guo2', 'highest pitch': 9.67, 'lowest pitch': 7.04, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '战', 'pinyin': 'zhan4', 'highest pitch': 11.45, 'lowest pitch': 9.2, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '果', 'pinyin': 'guo3', 'highest pitch': 7.28, 'lowest pitch': 5.68, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 8.69, 'lowest pitch': 5.68, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '多', 'pinyin': 'duo1', 'highest pitch': 9.94, 'lowest pitch': 7.13, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 9.29, 'lowest pitch': 6.65, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '狙', 'pinyin': 'jv1', 'highest pitch': 8.57, 'lowest pitch': 6.7, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '击', 'pinyin': 'ji1', 'highest pitch': 8.94, 'lowest pitch': 8.79, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '手', 'pinyin': 'shou3', 'highest pitch': 8.83, 'lowest pitch': 4.61, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '凯', 'pinyin': 'kai2', 'highest pitch': 9.93, 'lowest pitch': 4.75, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '尔', 'pinyin': 'er3', 'highest pitch': 10.08, 'lowest pitch': 3.61, 'duration': 0.33, 'prosody hierarchy': '#4'}]