What concepts are described in the following sentence?

"The bacon sandwich is a variation of the BLT (which contains lettuce) and is itself a variation of the club sandwich. Bacon sandwiches are popular in the UK, where the leader is Elizabeth II."

Return the answer as pairs of triples.
Bacon sandwich DISH_VARIATION BLT
BLT INGREDIENT Lettuce
BLT DISH_VARIATION Club sandwich
Bacon sandwich COUNTRY United Kingdom
United Kingdom LEADER_NAME Elizabeth II