text: __ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ___
  
  Now go to the Class hierarchy (inferred) tab in the Classes tab (see figure 4.25). You should see that 
  AmericanHotPizza is now classified as a subclass of SpicyPizza because it has a topping 
  (JalapenoPepperTopping) that has a spiciness value of Hot. 
  
  4.16 Cardinality Restrictions 
  In OWL we can describe the class of individuals that have at least, at most, or exactly a specified number 
  of relationships with other individuals or datatype values. The restrictions that describe these classes are 
  known as Cardinality Restrictions. For a given property P, a Minimum Cardinality Restriction specifies 
  the minimum number of P relationships that an individual must participate in. A Maximum Cardinality 
  Restriction specifies the maximum number of P relationships that an individual can participate in. A 
  Cardinality Restriction specifies the exact number of P relationships that an individual must participate in. 
  Relationships (for example between two individuals) are only counted as separate relationships if it can 
  be determined that the individuals that are the fillers for the relationships are different from each other. 
  
  Let’s add a cardinality restriction to our Pizza Ontology. We will create a new subclass of Pizza called 
  InterestingPizza which will be defied to have 3 or more toppings. 