Complex sentence: It began with the Pinty's presents the Clarington 200 at Canadian Tire Motorsport Park on May 18 and ended with the Pinty's 250 at Kawartha Speedway on September 20.
Split into simpler sentences: It began with the Pinty's presents the Clarington 200 at Canadian Tire Motorsport Park on May 18. It will end with the Pinty's 250 at Kawartha Speedway on September 20.