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: kayak, raft, fish, canyoning, dolphin

SOLUTION: dolphin

PROBLEM: Category: physical activity 
Words: bend, jog, get down, duck, pig

SOLUTION: pig

PROBLEM: Category: poker 
Words: deck, crew, call, joker, pack

SOLUTION:
crew