Trap is a type of Design. Design is related to Organization. Defense is a type of Organization. 
Stable is related to Barn. you are likely to find Machine in/at/on Barn. Machine is a synonym of Computer. Computer can be used for Learn. 
Trap --IsA--> Design <--RelatedTo--> Organization <--IsA-- Defense 
Stable <--RelatedTo--> Barn <--AtLocation-- Machine <--Synonym--> Computer --UsedFor--> Learn 