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: bird 
Words: dump truck, pelican, goose, crane, derrick

SOLUTION: dump truck

PROBLEM: Category: type of sandwich 
Words: open-faced, team, roll, doorstep, club

SOLUTION: team

PROBLEM: Category: window material 
Words: fork, glass, coating, frame, metal

SOLUTION:
fork