Simplify the following text for a Grade 10 native English-speaking person.
Original: Bred from a Welsh Terrier and an Otter Hound , the breed has also been called the Waterside Terrier , because it was bred originally to hunt otters in and around the valleys of the River Aire which runs through Airedale .
Simplified: The breed has also been called the Waterside Terrier , because it was bred originally to hunt otters in and around the valleys of the River Aire which runs through Airedale .