Question: What is the date of birth of Li Mao's father?
Sentence (from "Li Mao"): Li Qing (8th century–775), known as Li Mao (李瑁) from 725 and honored title Prince of Shou (壽王) was an Imperial Prince of Chinese Tang Dynasty, he was the eighteenth son of Emperor Xuanzong and his favorite concubine Consort Wu.
Relevant evidence: Yes