3 Africa 's Borderless Wars Foreign rebels have used the porous borders of Central African Republic , a potential bulwark against the chaos of its neighbors in Chad and the Darfur region of Sudan , as a staging ground to mount attacks over the border , spreading what the United Nations has called the world 's '' gravest humanitarian crisis . ''
Africa /location/location/contains Chad
Africa /location/location/contains Sudan
CD NNP POS NNP NNP NNP NNS VBP VBN DT JJ NNS IN JJ JJ NN , DT JJ NN IN DT NN IN PRP$ NNS IN NNP CC DT NNP NN IN NNP , IN DT NN NN TO VB NNS IN DT NN , VBG WP DT NNP NNPS VBZ VBN DT NN POS '' JJS JJ NN . ''
Africa
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Chad
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Africa
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Sudan
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