Question: When was Empress Liu (Tang Dynasty)'s husband born?
Sentence (from "Emperor Ruizong of Tang"): Emperor Ruizong of Tang (22 June 662 – 13 July 716), personal name Li Dan, also known at times during his life as Li Xulun, Li Lun, Wu Lun, and Wu Dan, was the fifth and ninth emperor of Tang Dynasty.
Relevant evidence: Yes