Balance is a type of Account. Balance is related to Equality. Equality is related to Justice. Justice is the opposite of Unfair. 
Memory is related to Long. Long is related to Tower. Tower is related to Column. Column is related to Margin. 
Account <--IsA-- Balance <--RelatedTo--> Equality <--RelatedTo--> Justice <--Antonym--> Unfair 
Memory <--RelatedTo--> Long <--RelatedTo--> Tower <--RelatedTo--> Column <--RelatedTo--> Margin 