Extend is a type of Change. Fold is a type of Change. Fold is related to Card. Card is related to Sympathy. 
Person wants (to) Air. Air is related to Source. Source is related to Wood. Wood is related to Heart. 
Extend --IsA--> Change <--IsA-- Fold <--RelatedTo--> Card <--RelatedTo--> Sympathy 
Person --Desires--> Air <--RelatedTo--> Source <--RelatedTo--> Wood <--RelatedTo--> Heart 