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: social gathering 
Words: grilled cheese, place, club, dance hall, meeting
answer:
grilled cheese


question:
Category: social gathering 
Words: convention, club, discothek, hamburger, dance hall
answer:
hamburger


question:
Category: bird 
Words: crane, swallow, winch, duck, davit
answer:

winch