Park is a type of Site. Site is related to Bed. Bed is related to Eye. Eye is related to Party. 
Insist is a synonym of Demand. Challenge is a type of Demand. Challenge is a synonym of Problem. 
Park --IsA--> Site <--RelatedTo--> Bed <--RelatedTo--> Eye <--RelatedTo--> Party 
Insist <--Synonym--> Demand <--IsA-- Challenge <--Synonym--> Problem 