question: ultrasonic:infrasound:military
choices.label: A B C D
choices.text: debut:masterpiece:literature router:isolation card:network submarine:nuclear submarine:technology polaris:big dipper:stars
explanation: "ultrasonic" and "infrasound" are frequencies and can be used for "military" purposes. the term "debut" is mostly used for literary creation and other aspects, and refers to a writer's representative work in the first stage. some "debuts" are "masterpieces", and some "masterpieces" are "debuts". "router" and "isolation card" both refer to frequencies and can be used for "network" purposes. "nuclear submarine" belongs to "submarine". "polaris" and "big dipper" have no obvious logical relationship.
relation: ultrasonic infrasound R2.4
relation: debut masterpiece R2.7
relation: router isolation card R2.4
relation: nuclear submarine submarine R2.2