Original sentence: Dyoll Greylight: Welsh Mountain Pony who arrived in 1911, is considered a founding sire.Riding pony.Sir Thomas and Dennington Court: Two Exmoor pony stallions who were imported in the mid-1800s.They compete in dressage, eventing, show jumping, combined driving, gymkhana, mounted games, and horse shows.Welsh pony
Edited sentence: Dyoll Greylight: Welsh Mountain Pony who arrived in 1911, is considered the founding sire and passed on his excellent looks to his offspring.Sir Thomas and Dennington Court: Two Exmoor stallions who were imported in the mid-1800s.They are especially successful in dressage, eventing, show jumping, combined driving, gymkhana, mounted games, and are extensively shown