Authority is a type of Permission. Authority is related to Guard. Guard is related to Gun. Gun is related to Instrument. 
Best is a type of Person. Person is related to Statue. Statue is related to Stone. Stone is related to Rough. 
Permission <--IsA-- Authority <--RelatedTo--> Guard <--RelatedTo--> Gun <--RelatedTo--> Instrument 
Best --IsA--> Person <--RelatedTo--> Statue <--RelatedTo--> Stone <--RelatedTo--> Rough 