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: employment activity 
Words: fire, remove, praise, inferno, replace

SOLUTION: inferno

PROBLEM: Category: animal 
Words: hamster, fish, tiger, canyoning, sea turtle

SOLUTION: canyoning

PROBLEM: Category: food 
Words: sausage, grub, wienerwurst, blunt, frank

SOLUTION:
blunt