Question: Who is Empress Liu (Li Cunxu'S Wife)'s father-in-law?
Sentence (from "Empress Liu (Li Cunxu's wife)"): It was the killing of the major general Guo Chongtao by at her order in 926 that created a cascade of military rebellions that led to Emperor Zhuangzong's downfall and death; she was subsequently killed by his adoptive brother and successor Li Siyuan (Emperor Mingzong).
Relevant evidence: No