Two analogies that relate objects to the associated rooms is given in the form "A : B. C : ?". "A : B" relates object A to room B. Your task is to replace the question mark (?) with the appropriate room for the given object C, following the "A : B" relation.
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Question: bookshelf : library. couch : ?

Answer: parlor


Question: couch : parlor. bed : ?

Answer: bedroom


Question: toolbox : shed. cabinet : ?

Answer:
bathroom