Complex sentence: Harlem Rocker (foaled April 25,2005 in Ontario) is a Grade I winning Canadian thoroughbred racehorse owned by Adena Springs Racing Venture, a partnership headed by Frank Stronach.
Split into simpler sentences: Harlem Rocker (foaled April 25,2005 in Ontario) is a Grade I winning Canadian thoroughbred racehorse. He was owned by Adena Springs Racing Venture, a partnership headed by Frank Stronach.