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.

[EX Q]: level, flat, apartment, squashed, lined
[EX A]: lined

[EX Q]: persistent, cool, level, scorching, funny
[EX A]: scorching

[EX Q]: history, whirlpool, sea, current, water
[EX A]:
history