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: animal 
Words: fish, bat, sea turtle, trap, goat

SOLUTION: trap

PROBLEM: Category: secretary duty 
Words: answer calls, file, correspondence, document, fax

SOLUTION: document

PROBLEM: Category: police punishment 
Words: ticket, suspension, pretty, fine, prison

SOLUTION:
pretty