Bacon sandwich:DISH_VARIATION:BLT####BLT:INGREDIENT:Lettuce####United Kingdom:LEADER_NAME:David Cameron####BLT:DISH_VARIATION:Club sandwich####Bacon sandwich:COUNTRY:United Kingdom
David Cameron is the leader of the United Kingdom, where Bacon sandwiches, a variation of BLT, are popular. Lettuce is one of the ingredients in a BLT which is a variation on the club sandwich.