Question: Who is Empress Wang (Southern Ming)'s father-in-law?
Sentence (from "Zhu Youlang"): He inherited the title Prince of Gui (桂王) from his brother and lived an obscure life as a minor member of the extremely large imperial family until the fall of Beijing and the suicide of Chongzhen, the last Ming emperor, in 1644 due to the rebellion of Li Zicheng's Shun dynasty and Zhang Xianzhong after Li Zicheng took Beijing.
Relevant evidence: No