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: secretary duty 
Words: organize, sort mail, fax, file, text
answer:
text


question:
Category: military rank 
Words: general, fighter, normal, major, lieutenant
answer:
normal


question:
Category: physical property 
Words: obese, fat, vitamin c, heavy, thin
answer:

vitamin c