Original sentence: The symphony was performed at the 2009 BBC Proms season as the finale to a concert celebrating the 800th anniversary of the University of Cambridge, as the composer was awarded an honorary doctorate by the university in 1893
Edited sentence: The symphony was performed by the BBC Symphony Orchestra at the 2009 BBC Proms season as the finale to a concert celebrating the 800th anniversary of the University of Cambridge, as the composer was awarded an honorary doctorate by the university in 1893