Question: What is the date of death of Queen Seonui's husband?
Sentence (from "Queen Seonui"): Queen Seonui (14 December 1705 – 12 August 1730), also known as Queen Dowager Gyeongsun (경순왕대비), was the wife and Queen Consort of King Gyeongjong of Joseon, the 20th monarch of the Joseon Dynasty.
Relevant evidence: Yes