Question: In what year was the emperor of whom Elizaveta Vorontsova was a mistress born?
Sentence (from "Elizaveta Vorontsova"): Elizaveta Romanovna Vorontsova (Russian: Елизавета Романовна Воронцова ) (13 August 1739 – 2 February 1792) was a mistress of Emperor Peter III of Russia.
Relevant evidence: Yes