You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What Saint Petersburg theater did Paul Gerdt star at?" whose answer is Mariinsky Theatre.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Paul Gerdt Saint Petersburg theater
Useful Output:

Doc 1: He was known as the "Blue Cavalier" of the Saint Petersburg stage, creating the roles of nearly every lead male character throughout the latter half of the
Doc 2: Pavel Andreyevich Gerdt was one of the greatest male dancers in ballet history and was the Imperial Theatre's Premier Danseur Noble for fifty-six years.
Doc 3: Pavel Andreyevich Gerdt (Russian: Па́вел Андре́евич Ге́рдт), also known as Paul Gerdt (22 November 1844, near Saint Petersburg, Russia – 12 August 1917  Theatre
Doc 4: Pavel Gerdt as Prince Siegfried in the Ballet Swan Lake, St. Petersburg, 1895. Found in the collection of Bolshoi Theatre Museum.
Doc 5: Pavel Gerdt as Prince Siegfried in the Ballet Swan Lake, St. Petersburg, 1895. Found in the collection of Bolshoi Theatre Museum. Show more