Question: Ahmad Niyaltigin was the treasurer of a sultan who rose to power by seizing what from his younger twin?
Sentence (from "Khalid bin Barghash of Zanzibar"): He was captured by British forces at Dar es Salaam in 1916 and was exiled to the Seychelles and Saint Helena before being allowed to return to East Africa where he died in Mombasa in 1927.
Relevant evidence: No