Task: Text Categorization
Input (English): This novel includes a search for the iyi uwa, a sacred stone that links the ogbanje Ezinma with the spirit world. In this novel, the District Commissioner wrote a study of the Igbo people entitled ""The Pacification of the Primitive Tribes of the Lower Niger. "" The protagonist's son Nwoye is converted to Christianity in this novel, which describes the colonization of Umuofia. For 10 points, name this novel in which Okonkwo hangs himself, a work by Chinua Achebe.
Output (English): Literature