/**
  * Convert all URI Resolver URIs which have a corresponding Original URI,
  * to that Original URI.
  * @param string $text
  * @return string $text
  */
 function convertURIsToOrigURIsInText( $text ) {
     $uris = RDFIOUtils::extractURIs( $text );
     if ( $uris != '' ) {
         foreach ( $uris as $uri ) {
             $origuri = $this->m_store->getOrigURIForURI( $uri );
             if ( $origuri != '' ) {
                 $text = str_replace( $uri, $origuri, $text );
             }
         }
     }
     return $text;
 }