<https://berlinspectator.com/2020/06/11/germany-how-to-fly-in-the-corona-crisis-new-rules-at-airports-and-on-aircraft-1/#person-ImanuelMarcus>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://berlinspectator.com/2020/06/11/germany-how-to-fly-in-the-corona-crisis-new-rules-at-airports-and-on-aircraft-1/>