Question: When was Liu Chengyou's father born?
Sentence (from "Liu Chengyou"): Liu Chengyou (劉承祐) (28 March 931 – 2 January 951), also known by his posthumous name Emperor Yin (隱皇帝), was the second and last emperor of imperial China's short-lived Later Han dynasty, during the Five Dynasties and Ten Kingdoms period.
Relevant evidence: No