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: measurement unit 
Words: ounce, ear, inch, foot, milimeter
answer:
ear


question:
Category: mode of transportation 
Words: spider, fly, drive, train, soar
answer:
spider


question:
Category: aesthetic characteristic 
Words: 70, fair, medium, light, milky
answer:

70