Cat is a type of Book. Textbook is a type of Book. 
Procedure is related to Division. Division is related to Calculation. Calculation is related to Rate. Rate is related to Score. 
Cat --IsA--> Book <--IsA-- Textbook 
Procedure <--RelatedTo--> Division <--RelatedTo--> Calculation <--RelatedTo--> Rate <--RelatedTo--> Score 