Question: What is the date of death of Nitya Pibulsonggram's father?
Sentence (from "Plaek Phibunsongkhram"): Phibunsongkhram was a member of the Royal Siamese Army wing of Khana Ratsadon, the first political party in Thailand, and a leader of the Siamese revolution of 1932 transforming Thailand from an absolute monarchy to a constitutional monarchy.
Relevant evidence: No