@prefix d:       <http://learningsparql.com/ns/data#> .
@prefix ab:      <http://learningsparql.com/ns/addressbook#> .

d:i9771
      <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
                    ab:Person .

d:i0432
      <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
                    ab:Person .

d:i8301
      <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
                    ab:Person .