Simplify the following text for a Grade 9 native English-speaking person.
Original: Johann Christian Bach ( September 5 , 1735 -- January 1 , 1782 ) was a composer of the Classical era , the eleventh and youngest son of Johann Sebastian Bach .
Simplified: Johann Christian Bach ( born Leipzig , 5 September 1735 ; died London , 1 January 1782 ) was a composer of the Classical period . He was the eleventh and youngest son of the great composer Johann Sebastian Bach .