The speaker, Margaret Sinclair, in the National Musical Excellency Society acts as ______.

Good evening, I am Margaret Sinclair, chairwoman of the National Musical Excellency Society. And I’d like to welcome you to Carnegie Hall, one of the world’s most famous performance auditoriums.
   The orchestra will perform in a few minutes. But before it does, I’d like to tell you about the hall’s recent renovations. In 1960, Carnegie Hall was scheduled to be torn down. It was in terrible shape. The roof was collapsing, the brick walls were crumbling and there was no money for renovation. Fortunately, the famed violinist Isaac Stem heard about the hall’s fate and organized a committee to save Carnegie Hall. He and others managed to raise fifty million dollars for repairs. Over 350 laborers and artisans have been working on and off since the money was raised to restore the hall’s grandeur. Today, the hall looks better than before.
   The orchestra will now play selections from the works of Leonard Bernstein. After the concert, a reception will be held in the main lobby. Thank you for your support. Without further ado, I now present the Cleavennent Symphony Orchestra.