question: buttons:suits:pants
choices.label: A B C D
choices.text: mouse:computer:keyboard student:youth:artist curtains:windows:house steering wheel:sedan:commercial vehicle
explanation: "buttons" are part of "suits" and "pants". both "mouse" and "keyboard" belong to the "computer" input device, and "mouse" and "keyboard" belong to the same category. some "students" are "youth", and some "youth" are "students". the "curtain" hangs on the "window", and the "curtain" corresponds to the "window". the "steering wheel" is an integral part of the "sedan" and "commercial vehicle".
relation: buttons suits pants R2.3
relation: mouse keyboard R2.4
relation: student youth R2.7
relation: curtains windows R3.6
relation: steering wheel sedan commercial vehicle R2.3