Simplify the following text for a Grade 8 native English-speaking person.
Original: The close friendship between Clapton and Harrison resulted in Clapton 's playing on Harrison 's `` While My Guitar Gently Weeps '' from the Beatles ' White Album .
Simplified: Clapton became friends with Beatle George Harrison , who asked him to play guitar on `` While My Guitar Gently Weeps '' , for 1968 's `` White Album '' .