<https://amp.theguardian.com/artanddesign/2012/apr/11/hans-peter-feldmann-gag-reflex>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.theguardian.com/artanddesign/2012/apr/11/hans-peter-feldmann-gag-reflex>