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: emotional status
Words: alright, alert, fine, detached, level

Answer: level

Question: Category: mode of transportation
Words: spider, fly, train, jog, car

Answer: spider

Question: Category: elements
Words: heat, cool, promote, burn, fire

Answer:
promote