<https://burkely.nl/products/fundamentals-vintage-en/fundamentals-vintage-en-2/burkely-fundamentals-vintage-max-worker-17/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://burkely.nl/products/fundamentals-vintage-en/fundamentals-vintage-en-2/burkely-fundamentals-vintage-max-worker-17/>