Question: What is the date of death of Raphi Phatthanasak's father?
Sentence (from "Raphi Phatthanasak"): Prince Raphi Phatthanasak, Prince of Ratchaburi , (21 October 1874– 7 August 1920) was a son of king Chulalongkorn and Chao Chom manda Talab.
Relevant evidence: Yes