Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
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Question: Category: weather 
Words: tangle, ghostly, fair, raining, sunny

Answer: ghostly


Question: Category: employment activity 
Words: sack, inferno, promote, empower, fire

Answer: inferno


Question: Category: fried food 
Words: doughnut, fritter, fried, pie, seperate

Answer:
seperate