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: geographical property 
Words: studio, hill, flat, even, horizontal

SOLUTION: studio

PROBLEM: Category: construction 
Words: windlass, crane, dump truck, pelican, digger

SOLUTION: pelican

PROBLEM: Category: poker 
Words: fold, chips, apron, pack, deck

SOLUTION:
apron