College can be Expensive. Expensive is a different concept from Cheap. 
Export is a type of Trade. Trade is related to Similar. Similar is related to Common. Common is similar to Familiar. 
College --HasProperty--> Expensive <--DistinctFrom--> Cheap 
Export --IsA--> Trade <--RelatedTo--> Similar <--RelatedTo--> Common <--SimilarTo--> Familiar 