Question: What Russian city are both Mariinsky Ballet and Arthur Saint-Léon located?
Sentence (from "Arthur Saint-Léon"): Arthur Saint-Léon (17 September 1821, Paris – 2 September 1870) was the "Maître de Ballet" of St. Petersburg Imperial Ballet from 1859 until 1869 and is famous for creating the choreography of the ballet "Coppélia".
Relevant evidence: Yes