Oxygen is the opposite of Carbon. Coal is a type of Carbon. Coal is a type of Supply. Extend is a type of Supply. 
Cave is related to Mountain. Mountain is related to Wave. Wave is related to Coast. Coast is related to Form. 
Oxygen <--Antonym--> Carbon <--IsA-- Coal --IsA--> Supply <--IsA-- Extend 
Cave <--RelatedTo--> Mountain <--RelatedTo--> Wave <--RelatedTo--> Coast <--RelatedTo--> Form 