Economics is related to Money. Money is related to Green. 
Input is the opposite of Print. Print is related to Outlet. Outlet is related to Electricity. Electricity is related to Type. 
Economics <--RelatedTo--> Money <--RelatedTo--> Green 
Input <--Antonym--> Print <--RelatedTo--> Outlet <--RelatedTo--> Electricity <--RelatedTo--> Type 