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: secretary duty 
Words: correspondence, schedule, answer calls, keys, file

SOLUTION: keys

PROBLEM: Category: outdoor sport activity 
Words: swim, wrestle, fish, canyoning, horse

SOLUTION: horse

PROBLEM: Category: baby animals 
Words: calf, fawn, lust, woods, doe

SOLUTION:
lust