Simplify the following text for a Grade 9 native English-speaking person.
Original: Florence Glenda Ballard Chapman ( June 30 , 1943 â `` February 22 , 1976 ) was an American singer and a founding member of the Motown group The Supremes .
Simplified: Florence Glenda Ballard Chapman ( June 30 , 1943 â `` February 22 , 1976 ) , is an American singer and one of the founders of The Supremes .