What concepts are described in the following sentence?

"Bacon sandwich, a variation of the club sandwich, is a dish from the United Kingdom. One of its ingredients is tomato. David Cameron is a leader in the UK."

Return the answer as pairs of triples.
Bacon sandwich DISH_VARIATION BLT
United Kingdom LEADER_NAME David Cameron
BLT DISH_VARIATION Club sandwich
BLT INGREDIENT Tomato
Bacon sandwich COUNTRY United Kingdom