Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Kahuzi-Biega National Park' has mentioned 'River' in the following places:
Occurrence Sentence Text Source
[1] The eastern part of the park is the smaller mountainous region measuring 600xc2xa0km2 (230xc2xa0sqxc2xa0mi); the larger part measures 5,400xc2xa0km2 (2,100xc2xa0sqxc2xa0mi) and consists mainly of lowland stretching from Bukavu to Kisangani, drained by the Luka and Lugulu rivers which flow into the Lualaba River.