sentences:  A limited time offering (LTO) sandwich line known as BK Toppers accompanied the Stacker line briefly in 2012, including one sandwich known as the Deluxe topper a virtual clone of the Big King in its formulation.The Stacker and Topper lines were discontinued in the United States shortly after, and the Big King returned to said market in November 2013 as a permanent product after the company was again sold, this time to 3G Capital of Brazil.Despite being off the menu in the United States for several years, the product was still sold in several other countries under several names during the interim of its unavailability in the United States.