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, large, fat, area, calcium
answer:
calcium


question:
Category: chocolate food 
Words: fudge, tart, chocolate cake, falsehood, cupcake
answer:
falsehood


question:
Category: corporate 
Words: rigged, shareholders, private, firm, streamline
answer:

rigged