Simplify the following text for a Grade 8 native English-speaking person.
Original: The group comprised Ben Folds ( vocals , piano , and principal songwriting ) , Robert Sledge ( bass guitar and backing vocals ) , and Darren Jessee ( drums , backing vocals and co-writer for some songs ) .
Simplified: Ben Folds , who was also the band 's lead singer , played piano , Robert Sledge played bass , and Darren Jessee played drums .