A vast , landlocked nation roughly three times the size of California , Chad has struggled to absorb hundreds of thousands of refugees who flooded across its border with the Darfur region of Sudan , where ethnic warfare rages .
Sudan /location/location/contains Darfur
Sudan /location/country/administrative_divisions Darfur
Darfur /location/administrative_division/country Sudan
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Sudan
LOCATION
Darfur
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/location/location/contains
Sudan
LOCATION
Darfur
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/location/country/administrative_divisions
Darfur
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Sudan
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