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: ocean 
Words: current, data sets, main, sea, wave

Answer: data sets


Question: Category: secretary duty 
Words: folder, support, order office supplies, correspondence, file

Answer: folder


Question: Category: aesthetic characteristic 
Words: light, fair, size, texture, loyal

Answer:
loyal