Serviço SPARQL em PHP

<?php
require_once( "sparqllib.php" );

$db = sparql_connect( 'http://dbpedia.org/sparql' );

if( !$db )
    { print sparql_errno() . ": " . sparql_error(). "\n"; exit; }

# Vamos recuperar os URIs dos compositores do barroco
$myquery = "select ?pessoa, ?nome where {
  ?pessoa dcterms:subject category:Baroque_composers.
 ?pessoa dbpprop:name ?nome.
}
ORDER BY ASC(?nome)";

$result = sparql_query( $myquery );
if( !$result )
    { print sparql_errno() . ": " . sparql_error(). "\n"; exit; }

print "<table class='example_table' border='1'>\n";
print "  <tr><th>URI</th></tr>\n";

while( $row = sparql_fetch_array( $result ) )
  {
	print "  <tr><td><a href='composer-pag.php?uri=".$row['pessoa']. "'>".$row['nome']."</a></td></tr>\n";
  }
print "</table>";

print "<p>Number of rows: ".sparql_num_rows( $result )." results.</p>";


?>