Killer is a type of Difficulty. Difficulty is related to Trouble. you are likely to find President in/at/on Trouble. President is related to Position. 
Interview is related to Boss. Boss is related to King. King is related to Administrator. 
Killer --IsA--> Difficulty <--RelatedTo--> Trouble <--AtLocation-- President <--RelatedTo--> Position 
Interview <--RelatedTo--> Boss <--RelatedTo--> King <--RelatedTo--> Administrator 