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: measurement unit 
Words: ounce, ear, inch, foot, milimeter

SOLUTION: ear

PROBLEM: Category: animal 
Words: bird, flutter, jump, waggle, fly

SOLUTION: flutter

PROBLEM: Category: outdoor sport activity 
Words: fish, trap, hiking, kayak, sea turtle

SOLUTION:
sea turtle