TASK DEFINITION: Two analogies that relate actions to the tools used to perform the action is given in the form "A : B. C : ?". "A : B" relates action A to tool B. Your task is to replace the question mark (?) with the appropriate tool for the given action C, following the "A : B" relation.
PROBLEM: vacuum : vacuum. drill : ?

SOLUTION: drill

PROBLEM: dig : shovel. unlock : ?

SOLUTION: key

PROBLEM: wash : soap. dig : ?

SOLUTION:
shovel