Irish is related to Edge. Edge is related to Position. Pitcher is a type of Position. Pitcher is a synonym of Rubber. 
Sharp is related to Glass. Glass is related to Serving. Serving is related to Servant. Servant is related to Position. 
Irish <--RelatedTo--> Edge <--RelatedTo--> Position <--IsA-- Pitcher <--Synonym--> Rubber 
Sharp <--RelatedTo--> Glass <--RelatedTo--> Serving <--RelatedTo--> Servant <--RelatedTo--> Position 