Question: The ballet whose act François Alu danced as a free variation at his first promotion competition was first presented in what city?
Sentence (from "Swan Lake (1895)"): Originally choreographed by Julius Reisinger to the music of Pyotr Ilyich Tchaikovsky (opus 20), it was first presented as "The Lake of the Swans" by the Ballet of the Moscow Imperial Bolshoi Theatre on 20 February/4 March 1877 (Julian/Gregorian calendar dates) in Moscow, Russia.
Relevant evidence: No