TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: level, flat, apartment, squashed, lined

SOLUTION: lined

PROBLEM: inlays, concerned, string, notes, fret

SOLUTION: concerned

PROBLEM: folder, document, file, image, correspondence

SOLUTION:
correspondence