choices.label: A B C D
choices.text: driver:police:traffic police dance:rap:ballet
  
   subject:research:scientific research car:electric vehicle:electric car
explanation: "military" can be "doctor", "doctor" can also be "military", "military doctor" is the intersection of the two. "driver" can be "police", "police" can also be "driver", but "traffic police" is not the intersection of the two, and some "traffic police" are not "drivers" "dance" and "rap" are both forms of performing art . "dance" is not "rap" "subject" refers to a relatively independent knowledge system that has no obvious logical relationship with "research". "car" can be "electric vehicle", "electric vehicle" can also be "car", and "electric car" is the intersection of the two.
relation: dance rap R2.4