test_evaluate

var parentElement = document.evaluate(xpaths.FB_Page_Scrape_Topic.Page_Scrape_Topic_Mention_Parent_DataHoverCard, document, null, 9, null).singleNodeValue;
    var authElement = document.evaluate(xpaths.FB_Page_Scrape_Topic.Page_Scrape_Topic_Author_DataHoverCard, document, null, 9, null).singleNodeValue;
    if (authElement) {
      Logger.production("Author HoverCard EL: " + JSON.stringify(authElement));
      if (authElement.getAttribute('data-hovercard')) {
        Logger.production("Author HoverCard EL data_hovercard: " + authElement.getAttribute('data-hovercard'));
      }
      if (authElement.getAttribute('data-hovercard')) {
        Logger.production("Author HoverCard EL text: commented");
      }
    }