Dare is a type of Challenge. Dare is related to Action. Key is part of Action. Key is related to Master. 
Productivity is a type of Ratio. Productivity is derived from Produce. Produce is the opposite of Destroy. 
Challenge <--IsA-- Dare <--RelatedTo--> Action <--PartOf-- Key <--RelatedTo--> Master 
Ratio <--IsA-- Productivity --DerivedFrom--> Produce <--Antonym--> Destroy 