Knock is a type of Comment. Attack is a type of Knock. Fork is a type of Attack. 
Plaintiff is the opposite of Defendant. Defendant can be Criminal. Person does not want (to) Criminal. Person does not want (to) Confrontation. 
Comment <--IsA-- Knock <--IsA-- Attack <--IsA-- Fork 
Plaintiff <--Antonym--> Defendant --HasProperty--> Criminal <--NotDesires-- Person --NotDesires--> Confrontation 