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: open-faced, team, roll, doorstep, club

SOLUTION: team

PROBLEM: Category: type of rigidity 
Words: rigged, firm, unyielding, streamline, taut

SOLUTION: streamline

PROBLEM: Category: fried food 
Words: doughnut, fritter, cake, pie, dally

SOLUTION:
dally