Data: Bacon Explosion, country, United States; United States, leader, Joe Biden; United States, ethnicGroup, White Americans; United States, capital, Washington, D.C.; United States, leaderTitle, President of the United States

The country Bacon Explosion comes from is the United States where political leaders include the President and Joe Biden. White Americans are one ethnic group there and the capital is Washington D.C.

Data: Alfa Romeo 164, engine, Straight-four engine; Alfa Romeo 164, transmission, "4-speed automatic (ZF 4HP18QE)"; Alfa Romeo 164, alternativeName, "Alfa Romeo 168"; Alfa Romeo 164, class, "Mid-size luxury / Executive car"

The Alfa Romeo 164 has a 4 speed automatic, straight-four engine. It is also known as the Alfa Romeo 168 and is classified as a mid-size luxury executive car.

Data: Amatriciana sauce, dishVariation, "Onion, garlic, black pepper, chili"; Amatriciana sauce, dishVariation, Onion
Onion is one variation of ingredients in Amatriciana sauce which has several variations including garlic, black pepper and chili.