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: elements 
Words: fire, earth, water, blaze, recruit
answer:
recruit


question:
Category: bird 
Words: concrete pourer, flamingo, egret, crane, duck
answer:
concrete pourer


question:
Category: window material 
Words: panel, coating, spatula, plastic, glass
answer:

spatula