php - xml parsing with simple xml -

possible duplicate:
problem simplexml , entity not being defined

i have tag entity in xml file:

<comune>forli&#39;</comune> 

simple xml in php fail parse file:

warning: simplexmlelement::__construct() [simplexmlelement.--construct]: parser error : entity 'igrave' not defined

how can do?

i tried small example , worked me

xml:

<?xml version="1.0" encoding="utf-8"?> <comune> <comune>forli&#39;</comune> </comune> 

php:

    $xml = simplexml_load_file('test.xml');      foreach($xml->children() $child){          echo '<pre>';         print_r((string)$child);         echo '</pre>asd';     } 

output:

forli'