Question: Where did Euphrosyne Kastamonitissa's husband die?
Sentence (from "Euphrosyne Kastamonitissa"): Euphrosyne Kastamonitissa was a Byzantine noble woman of the Kastamonites family, a wife of Andronikos Doukas Angelos (a cousin of the ruling Komnenos dynasty) and mother of the two future Byzantine emperors from the Angelos family: Isaac II Angelos and Alexios III Angelos.
Relevant evidence: Yes