text: 1. Select MargheritaPizza from the class hierarchy on the Classes tab. 
  
  2. Select Edit>Duplicate selected class. This will bring up a dialogue for you to duplicate the class. The 
  default is the name of the existing class so there will be a red error message when you start because you 
  need to enter a new name. Change the name from MargheritaPizza to AmericanaPizza. Leave all the other 
  options as they are and then select OK. 
  
  3. Make sure that AmericanaPizza is still selected. Click on the Add icon (+) next to the SubClass Of field 
  in the Description view for AmericanaPizza. 
  
  4. Use either the Object restriction creator tab or the Class expression editor tab to add the additional 
  restriction: hasTopping some PepperoniTopping. 
  
  5. Click on OK to enter the new restriction. 
  
  6. Edit the comment annotation on AmericanaPizza. It should currently be: A pizza that only has 
  Mozzarella and Tomato toppings since it was copied over from MargheritaPizza. Note that at the top 
  right of the comment there are three little icons, an @ sign, an X and an O. Click on the O. This icon is 
  the one you use to edit any existing data in Protégé. This should bring up a window where you can edit 
  the comment. Change it to something appropriate such as: A pizza that only has Mozzarella, Tomato, and 
  Pepperoni toppings. Then click on OK to enter the edit to the comment. 
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