<https://www.sophiebillard.com/2019/05/module-en-tensegrite-alu-61-constellation-de-l-octaedre.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.sophiebillard.com/2019/05/module-en-tensegrite-alu-61-constellation-de-l-octaedre.html>