sentences:  In East Asia, the chains sells the Angus XT sandwich which is a variant of the Steakhouse XT.In Great Britain, the chain has also introduced a burger based on lamb and another based on Wagyu beef, while back in the United States it sold a turkey burger sandwich – all of which were limited time offerings (LTOs).To promote continuing interest in these products, Burger King occasionally released limited-time (LTO) variants on its premium burgers that have different ingredients from the standard sandwich recipes.