 Complete the following phrase:  Bili coordinates 49N 2510E, which is about 200 km east of Bondo and 250 km north of Buta, is a city in the Bas-Uélé District in the northern Democratic Republic of the Congo in Central Africa. It lies along the Bili river, a tributary of the Ubangi river. It lies 50 km south of the Mbomou river, which forms the border with the Central African Republic. It is situated to the north of the Uélé river. The town has existed since at least 1908. It sits on land covered in marshlands, swamps and savannah, with patches of forest, while to the south of the Uélé lies dense unbroken rainforest. The local populace of the greater area are Azande. In 2005, a Time reporter found the region was highly undeveloped due to 