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.
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Question: Category: shady activities 
Words: falsification, fib, invent, fudge, cupcake

Answer: cupcake


Question: Category: moral characteristic 
Words: frank, stern, bun, concise, precise

Answer: bun


Question: Category: social gathering 
Words: meeting, community, lettuce, club, cinema

Answer:
lettuce