Fork is a type of Attack. Rip is a type of Attack. 
Crime is related to Criminal. Criminal is related to Hang. Hang is related to Dry. Dry is related to Roof. 
Fork --IsA--> Attack <--IsA-- Rip 
Crime <--RelatedTo--> Criminal <--RelatedTo--> Hang <--RelatedTo--> Dry <--RelatedTo--> Roof 