public static function createFromRDF(EasyRdf_Resource $annoResource)
 {
     $textAnno = new TextAnnotation($annoResource->getUri(), $annoResource->getLiteral("stanbol:start")->getValue(), $annoResource->getLiteral("stanbol:end")->getValue(), $annoResource->getLiteral("stanbol:confidence")->getValue());
     $textAnno->setSelectedText($annoResource->getLiteral("stanbol:selected-text")->getValue());
     return $textAnno;
 }