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: corporate 
Words: unyielding, concerted, firm, combined, united
answer:
unyielding


question:
Category: aesthetic characteristic 
Words: medium, just, light, ghostly, fair
answer:
just


question:
Category: outdoor sport activity 
Words: fish, hike, hunting, row, dog
answer:

dog