Question: When did Mahidol Adulyadej's father die?
Sentence (from "Mahidol Adulyadej"): Mahitala Dhibesra Adulyadej Vikrom, the Prince Father (1 January 1892 – 24 September 1929), formerly Mahidol Adulyadej, Prince of Songkla  or Mahidol Songkla, was the father of King Ananda Mahidol (Rama VIII) and King Bhumibol Adulyadej (Rama IX) of Thailand.
Relevant evidence: Yes