Perform XPath on the passage XML

        :param args: Ordered arguments for etree._Element().xpath()
        :param kwargs: Named arguments
        :return: Result list
        :rtype: list(etree._Element)

def xpath(self, *args, **kwargs):
        """ Perform XPath on the passage XML

        :param args: Ordered arguments for etree._Element().xpath()
        :param kwargs: Named arguments
        :return: Result list
        :rtype: list(etree._Element)
        """
        if "smart_strings" not in kwargs:
            kwargs["smart_strings"] = False
        return self.resource.xpath(*args, **kwargs)