Question: An Opera House in San Francisco, California is located on the western side of Van Ness Avenue across from the rear facade of City Hall was the opera house that held the first performance of Elegy, who performed Elegy?

Context paragraphs:
Van Ness station: Van Ness Station is a Muni Metro station on the Market Street Subway at the intersection of Market Street and Van Ness Avenue (U.S. Route 101) in San Francisco, California.  The station consists of a concourse mezzanine on the first floor down, and a single island platform on the second level down.  Service at this station began in February 1980.

100 Van Ness Avenue: 100 Van Ness is a skyscraper in San Francisco.  Formerly an office building, it was converted into residential use.  It is located in the Civic Center neighborhood near the San Francisco City Hall on Van Ness Avenue.  The building, completed in 1974, stands 400 ft and has 29 floors of former office space that housed the California State Automobile Association (CSAA).

Civic Center, San Francisco: The Civic Center in San Francisco, California, is an area of a few blocks north of the intersection of Market Street and Van Ness Avenue that contains many of the city's largest government and cultural institutions.  It has two large plazas (Civic Center Plaza and United Nations Plaza) and a number of buildings in classical architectural style.  The Bill Graham Civic Auditorium (formerly the Exposition Auditorium), the United Nations Charter was signed in the War Memorial Veterans Building's Herbst Theatre in 1945, leading to the creation of the United Nations.  It is also where the 1951 Treaty of San Francisco (the peace treaty that officially ended the Pacific War with the Empire of Japan, which had surrendered in 1945) was signed.  The San Francisco Civic Center was designated a National Historic Landmark in 1987 and listed in the National Register of Historic Places on October 10, 1978.

War Memorial Opera House: The War Memorial Opera House in San Francisco, California is located on the western side of Van Ness Avenue across from the rear facade of City Hall.  It is part of the San Francisco War Memorial and Performing Arts Center.  It has been the home of the San Francisco Opera since opening night in 1932.

Van Ness Bus Rapid Transit: The Van Ness Bus Rapid Transit project is designed to bring rapid transit services to the thoroughfare from Mission Street to Lombard Street.  Dedicated bus lanes for the 47 Van Ness bus, 49 Van Ness–Mission trolleybus, and Golden Gate Transit are to be constructed along the median with 6 in side platforms at stations for boarding and alighting passengers away from the curb.  Additionally, underground water and sewer replacement and landscaping will take place on Van Ness Avenue.

Van Ness Avenue: Van Ness Avenue is a north-south thoroughfare in San Francisco, California, running from Market St north to the Bay.  Originally named Marlette Street, the street was renamed Van Ness Avenue in honor of the city's seventh mayor, James Van Ness.  Van Ness Avenue begins at Market Street near the Civic Center, and extends north to end at Bay Street at Fort Mason.  Of the more striking landmarks along the route are the San Francisco City Hall, the War Memorial Opera House, and Louise M. Davies Symphony Hall.

Geary Boulevard: Geary Boulevard (designated as Geary Street east of Van Ness Avenue) is a major east-west 5.8 mi long thoroughfare in San Francisco, California, United States, beginning downtown at Market Street near Market Street's intersection with Kearny Street, and running westbound through downtown, the Civic Center area, the Western Addition, and running for most of its length through the predominantly residential Richmond District.  Geary Boulevard terminates near Sutro Heights Park at 48th Avenue, close to the Cliff House above Ocean Beach at the Pacific Ocean.  At 40th Avenue, Geary intersects with Point Lobos Avenue, which takes through traffic to the Cliff House, Ocean Beach and the Great Highway.  It is a major commercial artery through the Richmond District; it is lined with stores and restaurants, many of them catering to the various immigrant groups (Chinese, Russian, and Irish, among many others) who live in the area.  The boulevard borders Japantown between Fillmore and Laguna Streets.

Elegy (Corigliano): Elegy is an orchestral composition by the American composer John Corigliano.  It was first performed by the San Francisco Symphony under the direction Verne Sellin at the War Memorial Opera House on June 1, 1966.  The piece is dedicated to the composer Samuel Barber.

California State Route 480: State Route 480 (SR 480) was a state highway in San Francisco, California, United States, consisting of the elevated double-decker Embarcadero Freeway (also known as the Embarcadero Skyway), the partly elevated Doyle Drive approach to the Golden Gate Bridge and the proposed and unbuilt section in between.  The unbuilt section from Doyle Drive to Van Ness Avenue was to have been called the Golden Gate Freeway and the "Embarcadero Freeway" as originally planned would have extended from Van Ness along the north side of Bay Street and then along the Embarcadero to the San Francisco-Oakland Bay Bridge.

San Francisco Maritime National Historical Park: The San Francisco Maritime National Historical Park is located in San Francisco, California, United States.  The park includes a fleet of historic vessels, a visitor center, a maritime museum, and a library/research facility.  The park is sometimes referred to as the San Francisco Maritime Museum, its former 1951 name that changed in 1978 when the collections were acquired by the National Park Service.  Today's San Francisco Maritime National Historical Park was authorized in 1988; the maritime museum is among the park's many cultural resources.  The park also incorporates the Aquatic Park Historic District, bounded by Van Ness Avenue, Polk Street, and Hyde Street.

Supporting paragraphs: Elegy (Corigliano) War Memorial Opera House
Answer: San Francisco Symphony