discussed in chapter 7). So, add the following to the SPARQL query after the last PREFIX statement:  
PREFIX pizza: <http://www.semanticweb.org/pizzatutorial/ontologies/2020/PizzaTutorial#> 
We are almost ready to query the actual ontology. For our first query let’s find all the Pizzas purchased by 
a Customer. The SPARQL code for this is: