Question: how is Princess Yolanda of Savoy and Elena of Montenegro related?
Sentence (from "Princess Yolanda of Savoy"): Princess Yolanda of Savoy (1 June 1901 – 16 October 1986) was the eldest daughter of King Victor Emmanuel III of Italy and his wife Queen Elena of Montenegro, and the sister of Umberto II, the last king of Italy.
Relevant evidence: Yes