Simplify the following text for a Grade 9 native English-speaking person.
Original: Rutland Boughton ( 23 January 1878-25 January 1960 ) was an English composer who became well known in the early 20th century as a composer of opera and choral music .
Simplified: Rutland Boughton ( born Aylesbury , Buckinghamshire 23 January 1878 ; died London , 25 January , 1960 ) was an English composer . He was well known in the early 20th century as a composer of opera and choral music .