question: train:subway
choices.label: A B C D
choices.text: car:truck aircraft:rocket telpher:mountain road wooden boat:steamboat
explanation: both "trains" and "subways" belong to daily transportation tools. and they are both running on land. both "cars" and "trucks" belong to daily transportation tools. and they are both running on land. "aircraft" belongs to daily transportation tools which do not include "rockets", a means of delivery. a "telpher", also known as a chairlift, a cable car, or a pulley system, is a means of transportation that usually carries passengers or goods up and down the rugged hillside,sssss but the "mountain road" is not a means of transportation. "wooden boats" powered by steam can be called "steamboats", and "steamboats" can also be "wooden boats. the two both run in water.
relation: train subway R2.4
relation: car truck R2.4
relation: telpher mountain road R2.4
relation: wooden boat steamboat R2.7