Dirty is derived from Dirt. Dirty is the opposite of Clear. Clear is related to Description. 
Impression is a type of Press. Press is related to Journalist. Columnist is a type of Journalist. 
Dirt <--DerivedFrom-- Dirty <--Antonym--> Clear <--RelatedTo--> Description 
Impression --IsA--> Press <--RelatedTo--> Journalist <--IsA-- Columnist 