Expensive is the opposite of Free. Free is a synonym of Release. Release is a type of Device. Device is related to Fan. 
Foreign is the opposite of Home. Home is a different concept from Camp. Camp is related to Boy. Boy is related to Species. 
Expensive <--Antonym--> Free <--Synonym--> Release --IsA--> Device <--RelatedTo--> Fan 
Foreign <--Antonym--> Home <--DistinctFrom--> Camp <--RelatedTo--> Boy <--RelatedTo--> Species 