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: corporate 
Words: corporation, firm, synergy, tough, concerted
answer:
tough


question:
Category: aesthetic characteristic 
Words: mild, fair, texture, even, milky
answer:
mild


question:
Category: emotional status 
Words: calm, jail time, alert, mad, fine
answer:

jail time