Question: Who is Maria Of Antioch-Armenia's mother-in-law?
Sentence (from "Maria of Antioch-Armenia"): She was the great-granddaughter of Roupen III, prince of Armenia (Roupen III's daughter was Alice), who had been succeeded by his brother Leo I. Maria thus unsuccessfully claimed rights to the throne of Armenia, something her father and grandmother had previously attempted and failed.
Relevant evidence: No