public static function FILTER_SANITIZE_GENDER($value)
	{
		if(preg_match('/^\s*m/i',$value)){
			$value = 'http://schema.org/Male';
		} elseif (preg_match('/^\s*f/i',$value)) {
			$value = 'http://schema.org/Female';
		} else  {
			$value = null;
		};
		return $value;
	}