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: outdoor sport activity 
Words: whale, fish, raft, hiking, kayak

SOLUTION: whale

PROBLEM: Category: military rank 
Words: sargent, ordinary, captain, colonel, general

SOLUTION: ordinary

PROBLEM: Category: date status 
Words: sea, data sets, current, detestings, delayed

SOLUTION:
sea