<https://tennisturnier.info/docs/handbuch-wordpress-tennisturnier-plugin/einleitung/#webpage>
<http://schema.org/datePublished>
"2018-10-06T09:59:18+00:00"^^<http://schema.org/Date>
<https://tennisturnier.info/docs/handbuch-wordpress-tennisturnier-plugin/einleitung/>