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: construction 
Words: windlass, crane, dump truck, pelican, digger

SOLUTION: pelican

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

SOLUTION: submarine

PROBLEM: Category: weather 
Words: texture, fair, 70, warm, raining

SOLUTION:
texture