$result = new NamedGraphMem("resultGraph");

$statement1 = new Statement(new Blanknode("_bN0"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"),new Resource("http://example.org/data/x"));
$statement2 = new Statement(new Blanknode("_bN0"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"),new Resource("http://example.org/ns#p"));
$statement3 = new Statement(new Blanknode("_bN0"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#object"),new Literal("1"));

$statement4 = new Statement(new Blanknode("_bN2"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"),new Resource("http://example.org/data/y"));
$statement5 = new Statement(new Blanknode("_bN2"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"),new Resource("http://example.org/ns#q"));
$statement6 = new Statement(new Blanknode("_bN2"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#object"),new Resource("http://example.org/data/x"));

$statement7 = new Statement(new Blanknode("_bN1"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"),new Resource("http://example.org/data/x"));
$statement8 = new Statement(new Blanknode("_bN1"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"),new Resource("http://example.org/ns#p"));
$statement9 = new Statement(new Blanknode("_bN1"),new Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#object"),new Literal("2"));



$result->add($statement1);
$result->add($statement2);
$result->add($statement3);
$result->add($statement4);
$result->add($statement5);
$result->add($statement6);
$result->add($statement7);
$result->add($statement8);
$result->add($statement9);