Demographic is related to Age. Age is related to Category. Category is related to Country. you are likely to find Politics in/at/on Country. 
Subsidy is a type of Grant. Subsidy is the opposite of Tax. Tax is the opposite of Free. 
Demographic <--RelatedTo--> Age <--RelatedTo--> Category <--RelatedTo--> Country <--AtLocation-- Politics 
Grant <--IsA-- Subsidy <--Antonym--> Tax <--Antonym--> Free 