instruction:
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.
question:
Category: mode of transportation 
Words: train, spider, wave, fly, drive
answer:
spider


question:
Category: body part 
Words: heel, shin, pound, finger, foot
answer:
pound


question:
Category: outdoor sport activity 
Words: fish, mice, row, kayak, canoe
answer:

mice