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: physical property 
Words: brittleness, protein, bulky, skinny, fat
answer:
protein


question:
Category: secretary duty 
Words: folder, support, order office supplies, correspondence, file
answer:
folder


question:
Category: weather 
Words: cool, cold, 70, fair, raining
answer:

cool