sentences:  The BK Toppers line was a line of cheeseburgers introduced in October 2011 as limited time offer.The sandwiches featured a new chopped beef patty that features a coarser grind than the company's hamburger patty.The four sandwiches in the line were the Cheeseburger Deluxe, Mushroom and Swiss, Bacon and Cheddar, and Western BBQ.