Coat is a synonym of Cake. Cake is related to Candy. Person wants (to) Candy. Person does not want (to) Diabetes. 
Principle is related to Interest. Interest is related to Cost. 
Coat <--Synonym--> Cake <--RelatedTo--> Candy <--Desires-- Person --NotDesires--> Diabetes 
Principle <--RelatedTo--> Interest <--RelatedTo--> Cost 