Question: Why did Omar Ali Saifuddien Iii's father die?
Sentence (from "Omar Ali Saifuddien III"): Waddien ibni Almarhum Sultan Muhammad Jamalul Alam II, GCVO, KCMG; 23 September 1914 – 7 September 1986) was the 28th Sultan of Brunei who ruled from 4 June 1950 until his voluntary abdication from the throne on 5 October 1967.
Relevant evidence: Yes