Question: What nationality is Zahra Aga Khan's father?
Sentence (from "Aga Khan IV"): It is believed that the Aga Khan is a direct lineal descendant of the Islamic prophet Muhammad through Muhammad's cousin and son-in-law, Ali, considered the first Imam in Shia Islam, and Ali's wife Fatima az-Zahra, Muhammad's daughter from his first marriage.
Relevant evidence: No