TASK DEFINITION: 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.
PROBLEM: mainland : boat. mall : ?

SOLUTION: bus

PROBLEM: australia : airplane. downtown : ?

SOLUTION: subway

PROBLEM: downtown : subway. canada : ?

SOLUTION:
car