Gun is related to Hunter. Hunter is related to Carrier. Carrier is related to Box. 
Memory is related to Access. Access is a type of Approach. Approach is a type of Address. Address is related to Identification. 
Gun <--RelatedTo--> Hunter <--RelatedTo--> Carrier <--RelatedTo--> Box 
Memory <--RelatedTo--> Access --IsA--> Approach --IsA--> Address <--RelatedTo--> Identification 