Case is a type of Person. Person wants (to) Escape. Escape is related to Prisoner. Prisoner is related to Crime. 
Doorway can be used for Safety. you are likely to find Doorway in/at/on Bedroom. Bedroom is related to Blanket. 
Case --IsA--> Person --Desires--> Escape <--RelatedTo--> Prisoner <--RelatedTo--> Crime 
Safety <--UsedFor-- Doorway --AtLocation--> Bedroom <--RelatedTo--> Blanket 