Question: When is Vajiravudh's father's birthday?
Sentence (from "Vajiravudh"): Vajiravudh, also known as King Rama VI, reigning title Phra Mongkut Klao Chao Yu Hua (1 January 1881 – 26 November 1925), was the sixth monarch of Siam under the Chakri dynasty, ruling from 1910 until his death in 1925.
Relevant evidence: Yes