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.

Category: moral characteristic 
Words: wiener, frank, integrity, loyalty, stern
wiener

Category: aesthetic characteristic 
Words: prison, fine, there, handsome, high quality
prison

Category: construction 
Words: pelican, excavator, derrick, tackle, crane

pelican