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: emotional status 
Words: nervous, frustrated, fret, jack, concerned

SOLUTION: jack

PROBLEM: Category: type of sandwich 
Words: dagwood, club, doorstep, hamburger, community

SOLUTION: community

PROBLEM: Category: social gathering 
Words: community, club, outing, meeting, burger

SOLUTION:
burger