Question: What great artist that Natalia Troitskaya sang with, did a duet with Freddie Mercury that became one of the two official theme songs for the 1992 Olympics?
Sentence (from "Natalia Troitskaya"): She was a frequent partner of Plácido Domingo during the 1980s and also sang opposite other great artists like Montserrat Caballé, Dmitri Hvorostovsky, and Luciano Pavarotti.
Relevant evidence: Yes