Officer is related to Guard. Guard is related to Safe. you are likely to find Safe in/at/on Cabinet. 
Priority is related to Important. Friendship can be Important. Friendship is derived from Friend. Brother is a type of Friend. 
Officer <--RelatedTo--> Guard <--RelatedTo--> Safe --AtLocation--> Cabinet 
Priority <--RelatedTo--> Important <--HasProperty-- Friendship --DerivedFrom--> Friend <--IsA-- Brother 