instruction:
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.
question:
Category: computers 
Words: ram, file, prepare, keys, format
answer:
prepare


question:
Category: police punishment 
Words: jail, fine, bright, arrest, flyaway
answer:
bright


question:
Category: temperature 
Words: hot, refreshing, popular, tropical, cool
answer:

popular