Question: In what year was the emperor of whom Elizaveta Vorontsova was a mistress born?
Sentence (from "Peter III of Russia"): He was born in Kiel as Karl Peter Ulrich, the only child of Charles Frederick, Duke of Holstein-Gottorp, (the child of Hedvig Sophia of Sweden, sister of Charles XII), and Anna Petrovna, (the elder surviving daughter of Peter the Great).
Relevant evidence: No