<https://tennisturnier.info/docs/handbuch-wordpress-tennisturnier-plugin/einleitung/#webpage>
<http://schema.org/dateModified>
"2021-01-02T20:54:30+00:00"^^<http://schema.org/Date>
<https://tennisturnier.info/docs/handbuch-wordpress-tennisturnier-plugin/einleitung/>