Giant is related to Huge. Huge is related to Factory. Factory is related to Producer. 
Agency is a type of Action. Action is related to Call. Call is a type of Telephone. Telephone is related to Home. 
Giant <--RelatedTo--> Huge <--RelatedTo--> Factory <--RelatedTo--> Producer 
Agency --IsA--> Action <--RelatedTo--> Call --IsA--> Telephone <--RelatedTo--> Home 