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: guitar part 
Words: fret, concerned, jack, notes, amp
answer:
concerned


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


question:
Category: guitar part 
Words: string, frustrated, chord, output cord, fret
answer:

frustrated