private function getStatisticSites() {
		$result = [ ];
		
		$StatistikQuery = new \SMWPrintRequest ( \SMWPrintRequest::PRINT_PROP, "StatistikQuery",
				\SMWPropertyValue::makeUserProperty ( 'StatistikQuery' ) );
		$StatistikTemplate = new \SMWPrintRequest ( \SMWPrintRequest::PRINT_PROP, "StatistikTemplate",
				\SMWPropertyValue::makeUserProperty ( 'StatistikTemplate' ) );
		
		$pages = QueryUtils::executeBasicQuery ( '[[Category:Statistik]]', [$StatistikQuery, $StatistikTemplate ], [] );
		
		while ( $res = $pages->getNext () ) {
			$pageID = $res [0]->getNextText ( SMW_OUTPUT_WIKI );
			$StatistikQuery = $res [1]->getNextText ( SMW_OUTPUT_WIKI );
			$StatistikTemplate = $res [2]->getNextText ( SMW_OUTPUT_WIKI );
			$mwTitle = \Title::newFromText ( $pageID );
			$result [] = [ 'title' => $mwTitle,
						   'statistikQuery' => urldecode($StatistikQuery),
						   'statistikTemplate' => urldecode($StatistikTemplate)
			];
		}
		
		return $result;
	}