<https://s3.amazonaws.com/pb_previews/447_colours-at-sunrise/447_full_colours-at-sunrise_0150_preview.mp3>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.premiumbeat.com/nl/royalty-free-music?similar=nature-s-master-plan>