Sentence: The Alfa Romeo 164 is also known as the "Alfa Romeo 168" and is considered a mid-size luxury executive car. It has a 6-speed manual Getrag transmission and a straight-four engine.

What structured data could we extract from this sentence?
Alfa Romeo 164, engine, Straight-four engine; Alfa Romeo 164, transmission, "6-speed manual (Getrag)"; Alfa Romeo 164, alternativeName, "Alfa Romeo 168"; Alfa Romeo 164, class, "Mid-size luxury / Executive car"