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: measurement unit 
Words: ounce, foot, kilometer, milimeter, heel

SOLUTION: heel

PROBLEM: Category: police punishment 
Words: fine, prime, firstrate, comfortable, ticket

SOLUTION: comfortable

PROBLEM: Category: mode of transportation 
Words: wave, jog, fly, ant, walk

SOLUTION:
ant