Secret is a type of Book. Fall is a type of Book. Fall is a type of Issue. Issue is related to Copy. 
Smoke is the opposite of Clean. Clean is related to Wipe. Towel is a type of Wipe. 
Secret --IsA--> Book <--IsA-- Fall --IsA--> Issue <--RelatedTo--> Copy 
Smoke <--Antonym--> Clean <--RelatedTo--> Wipe <--IsA-- Towel 