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: type of sandwich 
Words: clan, lettuce, bacon, club, submarine
answer:
clan


question:
Category: location (proximity) 
Words: neighboring, right there, shut down, close, bordering
answer:
shut down


question:
Category: personal characteristic 
Words: unflappalbe, mild, ethical, positive, cool
answer:

mild