you are likely to find Aircraft in/at/on Air. Aircraft is related to Plain. Plain is a different concept from Fantastic. Fantastic is a synonym of Wild. 
Costly is related to Dear. Dear is a synonym of Expensive. Expensive is related to Gas. Gas is related to Carbon. 
Air <--AtLocation-- Aircraft <--RelatedTo--> Plain <--DistinctFrom--> Fantastic <--Synonym--> Wild 
Costly <--RelatedTo--> Dear <--Synonym--> Expensive <--RelatedTo--> Gas <--RelatedTo--> Carbon 