Discover is related to Exploration. Moon can be used for Exploration. 
Mayor can be used for Council. Council can be used for Decide. Regulate is a type of Decide. Regulate is a synonym of Order. 
Discover <--RelatedTo--> Exploration <--UsedFor-- Moon 
Mayor --UsedFor--> Council --UsedFor--> Decide <--IsA-- Regulate <--Synonym--> Order 