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"): Among her signature roles were Tatyana in Pyotr Ilyich Tchaikovsky's "Eugene Onegin" and the title heroines in Verdi's "Aida", Puccini's "Manon Lescaut", and Puccini's "Tosca".
Relevant evidence: No