Doll is a type of Toy. Doll is related to Bay. Bay is related to Seed. 
Assist is a synonym of Serve. Serve is related to Servant. Servant is related to Master. Master is a type of Scholar. 
Toy <--IsA-- Doll <--RelatedTo--> Bay <--RelatedTo--> Seed 
Assist <--Synonym--> Serve <--RelatedTo--> Servant <--RelatedTo--> Master --IsA--> Scholar 