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: employment activity 
Words: fire, remove, praise, inferno, replace
answer:
inferno


question:
Category: bird 
Words: dump truck, tackle, crane, hoist, davit
answer:
dump truck


question:
Category: boxing terminology 
Words: hearts, deck, apron, box, glove
answer:

hearts