Leadership is a type of Ability. Leadership is related to Council. Council can be used for Advice. 
Sir is a synonym of Mate. Mate is a synonym of Couple. Couple is a type of Unit. Unit is related to Empire. 
Ability <--IsA-- Leadership <--RelatedTo--> Council --UsedFor--> Advice 
Sir <--Synonym--> Mate <--Synonym--> Couple --IsA--> Unit <--RelatedTo--> Empire 