Politician is a type of Worker. Astronomer is a type of Worker. Astronomer is related to Telescope. 
Government is related to Treaty. Treaty is related to Contract. Contract is a synonym of Reduce. Reduce is related to Minimize. 
Politician --IsA--> Worker <--IsA-- Astronomer <--RelatedTo--> Telescope 
Government <--RelatedTo--> Treaty <--RelatedTo--> Contract <--Synonym--> Reduce <--RelatedTo--> Minimize 