Storage is related to Unit. Unit is related to Crowd. Crowd is related to Exciting. 
Discovery is related to Shock. Shock is related to Injury. Injury is related to Scratch. 
Storage <--RelatedTo--> Unit <--RelatedTo--> Crowd <--RelatedTo--> Exciting 
Discovery <--RelatedTo--> Shock <--RelatedTo--> Injury <--RelatedTo--> Scratch 