Simplify the following text for a Grade 9 native English-speaking person.
Original: In the evening some 2000 ladies and gentlemen attended a concert given by the Band of the Coldstream Guards , which included vocal music , piano and organ solos .
Simplified: In the evening about 2000 ladies and gentlemen came to a concert given by the Band of the Coldstream Guards , which included vocal music , piano and organ solos .