Complex sentence: Bing is a cultivar of cherry that originated in the Pacific Northwest, specifically in what is now Milwaukie, OR and remains a major cultivar in Oregon, Washington, and British Columbia.
Split into simpler sentences: Bing is a cultivar of cherry that originated in the Pacific Northwest, specifically in what is now Milwaukie, Oregon. Bing remains a major cultivar in Oregon, Washington, and British Columbia.