Pitcher is related to Base. Base is related to Hide. Island can be used for Hide. World is a type of Island. 
Discover is a synonym of Detect. Detect is a synonym of Catch. Catch is a synonym of Contract. Insurance is a type of Contract. 
Pitcher <--RelatedTo--> Base <--RelatedTo--> Hide <--UsedFor-- Island <--IsA-- World 
Discover <--Synonym--> Detect <--Synonym--> Catch <--Synonym--> Contract <--IsA-- Insurance 