Simplify the following text for a Grade 9 native English-speaking person.
Original: Cranach had three sons , all artists : John Lucas Cranach , who died at Bologna in 1536 ; Hans Cranach , whose life is obscure ; and Lucas Cranach the younger ( 1515-1586 ) who took over his father 's workshop after his death .
Simplified: Cranach had two sons , both artists : Hans Cranach , whose life is obscure and who died at Bologna in 1537 ; and Lucas Cranach the younger , born in 1515 , who died in 1586 .