Simplify the following text for a Grade 8 native English-speaking person.
Original: William Thomas `` Bill '' Medley ( born September 19 , 1940 ) is an American singer and songwriter , best known as one half of The Righteous Brothers singing duo .
Simplified: Bill Medley ( born September 19 , 1940 in Los Angeles , California ) is an American singer and songwriter . He was a founding member of the Righteous Brothers .