Its prosecutors have also been investigating the mass killings in Uganda and Darfur , in Sudan , since 2002 .
Sudan /location/location/contains Darfur
Darfur /location/administrative_division/country Sudan
Sudan /location/country/administrative_divisions Darfur
PRP$ NNS VBP RB VBN VBG DT NN NNS IN NNP CC NNP , IN NNP , IN CD .