TASK DEFINITION: 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.
PROBLEM: Category: type of sandwich 
Words: clan, lettuce, bacon, club, submarine

SOLUTION: clan

PROBLEM: Category: temperature 
Words: cold, hot, cool, popular, relaxing

SOLUTION: popular

PROBLEM: Category: widespread 
Words: regular, general, captain, ubiquitous, popular

SOLUTION:
captain