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: unlock : key. mop : ?

SOLUTION: mop

PROBLEM: clamp : clamp. sweep : ?

SOLUTION: broom

PROBLEM: wash : detergent. sweep : ?

SOLUTION:
broom