Commissioner is a type of Worker. Worker is a type of Person. Consumer is a type of Person. Consumer is the opposite of Producer. 
Structure is etymologically related to Instruct. Instruct is a type of Inform. Prompt is a type of Inform. 
Commissioner --IsA--> Worker --IsA--> Person <--IsA-- Consumer <--Antonym--> Producer 
Structure --EtymologicallyRelatedTo--> Instruct --IsA--> Inform <--IsA-- Prompt 