Firm is a type of Business. Business is a type of Concern. Concern is a synonym of Interest. 
Ribbon is a type of Strip. Ribbon is related to River. River is related to Narrow. 
Firm --IsA--> Business --IsA--> Concern <--Synonym--> Interest 
Strip <--IsA-- Ribbon <--RelatedTo--> River <--RelatedTo--> Narrow 