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: mode of transportation 
Words: spider, fly, drive, train, soar

Answer: spider


Question: Category: poker 
Words: ring, deck, blind, cards, joker

Answer: ring


Question: Category: animal 
Words: raft, bat, whale, fish, sea turtle

Answer:
raft