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: social gathering 
Words: meeting, cinema, club, group, submarine

SOLUTION: submarine

PROBLEM: Category: ocean 
Words: flow, current, course, moon, dastards

SOLUTION: dastards

PROBLEM: Category: window material 
Words: woodwork, fork, lead, acrylic, glass

SOLUTION:
fork