Tie is a type of Competition. Competition is related to Swim. Swim is related to Olympic. Olympics is derived from Olympic. 
Nurse is related to Worker. Servant is a type of Worker. Servant is related to Sure. Sure is a synonym of Positive. 
Tie --IsA--> Competition <--RelatedTo--> Swim <--RelatedTo--> Olympic <--DerivedFrom-- Olympics 
Nurse <--RelatedTo--> Worker <--IsA-- Servant <--RelatedTo--> Sure <--Synonym--> Positive 