instruction:
Two analogies that relate places/locations to the associated travel mode is given in the form "A : B. C : ?". "A : B" relates place A to travel mode B. Your task is to replace the question mark (?) with the appropriate travel mode for the given place C, following the "A : B" relation.
question:
downtown : subway. canada : ?
answer:
car


question:
hospital : ambulance. mars : ?
answer:
spaceship


question:
island : boat. mars : ?
answer:

spaceship