Complex sentence: In 2006, the Rehabilitation Centre rescued and rehabilitated 139 animals and in 2007, the Park took in five rescued rattle snakes and rehabilitated them by the fall season when the snakes were eventually released to a den site.
Split into simpler sentences: In 2006, the Rehabilitation Centre rescued and rehabilitated 139 animals. In 2007, the Park took in five rescued rattle snakes and rehabilitated them until the fall season when the snakes were eventually released to a den site.