Courage is a type of Virtue. Courage is related to Lion. Lion can be used for Hunting. Hunting is a synonym of Search. 
Authority is related to General. General is related to Fuel. Fuel is related to Natural. Natural is related to Sea. 
Virtue <--IsA-- Courage <--RelatedTo--> Lion --UsedFor--> Hunting <--Synonym--> Search 
Authority <--RelatedTo--> General <--RelatedTo--> Fuel <--RelatedTo--> Natural <--RelatedTo--> Sea 