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: upraise, crane, excavator, digger, hoist

SOLUTION: hoist

PROBLEM: fire, blaze, water, flame, recruit

SOLUTION: recruit

PROBLEM: fish, wrestle, climbing, swim, cow

SOLUTION:
cow