Question: When was Charoensri Chanamayu's father born?
Sentence (from "Chulalongkorn"): All his reforms were dedicated to ensuring Siam's survival in the face of Western colonialism, so that Chulalongkorn earned the epithet "Phra Piya Maharat" (พระปิยมหาราช, the Great Beloved King).
Relevant evidence: No