You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: DRAMA 
Clue: Sula & Helena are robotesses in this Karel Capek play

Answer: "r.u.r."


Question: Category: "MEN" AT WORK 
Clue: This journalist said no one "has ever lost money by underestimating the intelligence of the great masses"

Answer: mencken


Question: Category: PREPOSITIONAL PHRASES 
Clue: In a 19th century poem, it precedes "...and through the wood, to Grandfather's house we go"

Answer:
over the river