question: car:parking radar:spare tire
choices.label: A B C D
choices.text: monitor:printer:copier pistol:muffler:holster watch:dial:hand mobile phone:battery:headphone
explanation: "parking radar" and "spare tire" are both "car" fittings, but not necessary components. "monitors" and "printers" have no obvious logical relationship. both "mufflers" and "holsters" are fittings for "pistols", but are not necessary components. the "dial" and "hands" are the components of the "watch" and are integral parts of the "watch". "battery" is an integral part of a "mobile phone".
relation: parking radar car R2.3
relation: spare tire car R2.3
relation: muffler pistol R2.3
relation: holster pistol R2.3
relation: dial watch R2.3
relation: hand watch R2.3
relation: battery mobile phone R2.3