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.

Category: FOLKLORE 
Clue: Old Stormalong soaped his ship to squeeze through the English channel; the soap rubbed off on these cliffs
the cliffs of dover

Category: MOVIE TWINS 
Clue: In "Twins" Arnold Schwarzenegger played a genius fluent in 12 languages; this actor played his con man twin
danny devito

Category: OCCUPATIONAL NAMES 
Clue: This name of a "Sound of Music" actor has the same origin as the job of fixing pipes

plummer