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.

[Q]: schedule, errands, file, schedule appointments, hardware
[A]: hardware


[Q]: cake, fudge, rich, invent, cream
[A]: invent


[Q]: upraise, excavator, hummingbird, crane, windlass
[A]:
hummingbird