Simplify the following text for a Grade 12 native English-speaking person.
Original: Coleridge-Taylor 's greatest success was undoubtedly his cantata Hiawatha 's Wedding-feast , which was widely performed by choral groups in England during Coleridge-Taylor 's lifetime and in the decades after his death .
Simplified: Coleridge-Taylor 's best-known work is his cantata Hiawatha 's Wedding-feast , which was performed very often by choral groups in England during his lifetime and for many years after his death .