Array is a type of Clothing. Clothing is related to Iron. Iron is a type of Gray. Gray is related to White. 
Memory is related to Knowledge. Knowledge is related to Skill. Skill is related to Art. Art is related to Creativity. 
Array --IsA--> Clothing <--RelatedTo--> Iron --IsA--> Gray <--RelatedTo--> White 
Memory <--RelatedTo--> Knowledge <--RelatedTo--> Skill <--RelatedTo--> Art <--RelatedTo--> Creativity 