Question: Hylton Riverside is a large retail park that hosts a business founded when 50 JJB Sports Fitness Clubs and the attached retail stores were purchased by who?
Sentence (from "Castletown, Sunderland"): A former mining community, the Hylton Colliery was located at the east end of the village, it lies north of the River Wear, and is near to Hylton Castle and Washington.
Relevant evidence: No