Couple is a type of Unit. Unit is related to Cash. Cash is a type of Exchange. 
Rope is a synonym of Sheet. Sheet is part of Ship. Ship is related to Deliver. Deliver is a synonym of Present. 
Couple --IsA--> Unit <--RelatedTo--> Cash --IsA--> Exchange 
Rope <--Synonym--> Sheet --PartOf--> Ship <--RelatedTo--> Deliver <--Synonym--> Present 