Government is related to Court. Court is related to Legal. Legal is related to Nation. Nation is the opposite of International. 
Diamond is related to Brilliant. Brilliant is related to Idea. Theme is a type of Idea. 
Government <--RelatedTo--> Court <--RelatedTo--> Legal <--RelatedTo--> Nation <--Antonym--> International 
Diamond <--RelatedTo--> Brilliant <--RelatedTo--> Idea <--IsA-- Theme 