The bacon sandwich (of which bread is an ingredient) is a variation of the BLT, which itself is a variation on the club sandwich. The bacon sandwich originated in the United Kingdom, where Elizabeth II is the head of state.
[['BLT', 'DISH_VARIATION', 'Club sandwich'], ['Bacon sandwich', 'INGREDIENT', 'Bread'], ['Bacon sandwich', 'DISH_VARIATION', 'BLT'], ['Bacon sandwich', 'COUNTRY', 'United Kingdom'], ['United Kingdom', 'LEADER_NAME', 'Elizabeth II']]