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: food 
Words: fortitude, meat, cheese, frank, pork

Answer: fortitude


Question: Category: physical property 
Words: bulky, angular momentum, pasty, fat, big

Answer: big


Question: Category: temperature 
Words: mild, unflappalbe, icy, cool, scorching

Answer:
unflappalbe