you are likely to find Bag in/at/on Drawer. Envelope is a type of Bag. Envelope is related to Mail. 
you are likely to find Barn in/at/on Country. Country is the opposite of State. Order is a type of State. 
Drawer <--AtLocation-- Bag <--IsA-- Envelope <--RelatedTo--> Mail 
Barn --AtLocation--> Country <--Antonym--> State <--IsA-- Order 