<https://www.cio.de/a/google-tests-black-links-in-search-results-and-people-freak-out,3257266>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cio.de/a/google-tests-black-links-in-search-results-and-people-freak-out,3257266>