Ultimate is a type of Software. File is a type of Software. File can be used for Organization. Organization is related to Nation. 
you are likely to find Airplane in/at/on Air. you are likely to find Roof in/at/on Airplane. Roof is a type of Single. 
Ultimate --IsA--> Software <--IsA-- File --UsedFor--> Organization <--RelatedTo--> Nation 
Air <--AtLocation-- Airplane <--AtLocation-- Roof --IsA--> Single 