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: meeting, bacon, submarine, toast, club
answer:
meeting


question:
Category: animal 
Words: hamster, mice, fish, tiger, row
answer:
row


question:
Category: secretary duty 
Words: file, answer, type, firewall, sort mail
answer:

firewall