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.

Q: Category: police punishment 
Words: flyaway, jail time, ok, arrest, fine

A: ok
****
Q: Category: social gathering 
Words: place, bar, doorstep, club, outing

A: doorstep
****
Q: Category: mode of transportation 
Words: spider, fly, train, jog, car

A:
spider
****