Question: Who is Empress Liu (Li Cunxu'S Wife)'s father-in-law?
Sentence (from "Empress Liu (Li Cunxu's wife)"): Empress Liu (劉皇后, personal name unknown) (died 926), formally Empress Shenminjing (神閔敬皇后, "the unassuming, suffering, and alert empress"), was the second wife and only empress of Emperor Zhuangzong of Later Tang
Relevant evidence: Yes