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: emotional display 
Words: buck, identity, culture, fawn, pester
answer:
buck


question:
Category: aesthetic characteristic 
Words: prison, fine, there, handsome, high quality
answer:
prison


question:
Category: type of rigidity 
Words: taut, streamline, firm, resistant, inflexible
answer:

streamline