question: airplane:car
choices.label: A B C D
choices.text: battery car:bicycle tricycle:motorcycle high-speed rail:tram ship:kayak
explanation: both "airplane" and "car" belong to means of transportation, and the power source of "airplane" and "car" is the engine. the power source of a "battery car" is electricity, the power source of a "bicycle" is manpower, and the power source of the "battery car" and "bicycle" are different. the power source of a "tricycle" is manpower, and the power source of a "motorcycle" is an engine."tricycle“ and ”motorcycles“ are powered by different sources. both "high-speed rail" and "tram" are means of transportation, and the power source of "high-speed rail" and "tram" are electric motors. the power source of a "ship" is a turbine and a steam engine; the power source of a "kayak" is that a person acts on the paddle, the paddle is drawn backward, and the water exerts a forward reaction force on the paddle. a "boat" and a "kayak" are powered by different sources.
relation: airplane car R2.4
relation: high-speed rail tram R2.4