Question: When did Queen Dowager Shi's husband die?
Sentence (from "Queen Dowager Shi"): Queen Dowager Shi (史太妃, personal name unknown) was a concubine of the late-Tang Dynasty warlord Yang Xingmi and the mother of two of Yang Xingmi's sons, Yang Wo and Yang Longyan (also known as Yang Wei), both of whom would become rulers of the Five Dynasties and Ten Kingdoms period state Wu (known as Hongnong during Yang Wo's reign), and thus was a queen dowager of Wu.
Relevant evidence: Yes