Complex sentence: Horses in ban'ei are often either purebred or crossbred variations of Percheron, Breton, and Belgian and their weight can surpass 1 ton; twice that of a Thoroughbred.
Split into simpler sentences: Horses in ban'ei are often either purebred or crossbred variations of Percheron, Breton, and Belgian. Their weight can surpass 1 ton, which is twice that of a Thoroughbred.