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: mode of transportation 
Words: bus, fly, jog, beetle, drive

Answer: beetle


Question: Category: construction 
Words: hoist, tackle, digger, excavator, crane

Answer: tackle


Question: Category: police punishment 
Words: comfortable, suspension, ticket, prison, fine

Answer:
comfortable