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: mode of transportation 
Words: bee, swim, fly, car, walk

SOLUTION: bee

PROBLEM: Category: guitar part 
Words: neck, strap lock, fret, angry, notes

SOLUTION: angry

PROBLEM: Category: food 
Words: hot dog, brash, entree, frank, grub

SOLUTION:
brash