也许是国内政治动荡和经济困境导致的。
究竟是何原因使得索马里成为海盗的天堂？[{'character': '究', 'pinyin': 'jiou1', 'highest pitch': 10.32, 'lowest pitch': 9.4, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '竟', 'pinyin': 'jing4', 'highest pitch': 10.07, 'lowest pitch': 8.82, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 10.02, 'lowest pitch': 8.46, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '何', 'pinyin': 'he2', 'highest pitch': 10.84, 'lowest pitch': 8.35, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '原', 'pinyin': 'van2', 'highest pitch': 10.6, 'lowest pitch': 6.57, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '因', 'pinyin': 'in1', 'highest pitch': 8.3, 'lowest pitch': 6.79, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '使', 'pinyin': 'shiii3', 'highest pitch': 7.89, 'lowest pitch': 6.18, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '得', 'pinyin': 'de2', 'highest pitch': 8.32, 'lowest pitch': 6.18, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '索', 'pinyin': 'suo2', 'highest pitch': 8.54, 'lowest pitch': 7.97, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '马', 'pinyin': 'ma2', 'highest pitch': 8.85, 'lowest pitch': 7.99, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '里', 'pinyin': 'li3', 'highest pitch': 8.85, 'lowest pitch': 4.86, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '成', 'pinyin': 'cheng2', 'highest pitch': 7.76, 'lowest pitch': 5.54, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 9.96, 'lowest pitch': 7.76, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '海', 'pinyin': 'hai3', 'highest pitch': 9.96, 'lowest pitch': 4.84, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '盗', 'pinyin': 'dao4', 'highest pitch': 10.44, 'lowest pitch': 9.65, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 9.65, 'lowest pitch': 6.58, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '天', 'pinyin': 'tian1', 'highest pitch': 8.12, 'lowest pitch': 6.96, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '堂', 'pinyin': 'tang2', 'highest pitch': 7.36, 'lowest pitch': 5.76, 'duration': 0.35, 'prosody hierarchy': '#4'}]