Question: When did Ubolratana Narinaga's husband die?
Sentence (from "Ubolratana Narinaga"): Ubolratana Narinaga, Princess Argavoraraja Kalya , born Princess Bua Ladavalya (28 November 1846 – 15 October 1901) was a consort of Chulalongkorn, the King of Siam.
Relevant evidence: Yes