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?
Sentence (from "100 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).
Relevant evidence: No