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


question:
Category: nutritional value 
Words: iron, heavy, vitamin c, fat, brittleness
answer:
brittleness


question:
Category: ocean 
Words: course, drink, detestings, brine, current
answer:

detestings