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: secretary duty 
Words: organize, sort mail, fax, file, text
text

Category: baby animals 
Words: buck, bambi, lust, fawn, deer
lust

Category: aesthetic characteristic 
Words: unprejudiced, milky, size, cool, fair

unprejudiced