Argument can cause/lead to Violence. Argument is related to War. War cannot be Nice. Nice is related to Proper. 
Contrast is related to Compare. Classify entails/necessarily involves Compare. 
Violence <--Causes-- Argument <--RelatedTo--> War --NotHasProperty--> Nice <--RelatedTo--> Proper 
Contrast <--RelatedTo--> Compare <--Entails-- Classify 