Complex sentence: He was sent to live with his maternal grandparents in Frome, Somerset, where his grandfather, Sydney James (1831-1907) was a successful veterinarian whose practice survives to this day as the Garston Veterinary Group.
Split into simpler sentences: He was sent to live with his maternal grandparents in Frome, Somerset, where his grandfather, Sydney James (1831-1907) was a successful veterinarian. His practice survives to this day as the Garston Veterinary Group.