<http://metamatter.io/som/hoorn_4> <http://schema.org/instrument> <http://metamatter.io/som/hoorn> .
<http://metamatter.io/som/hoorn_4> <http://schema.org/name> "Hoorn 4" .
<http://metamatter.io/som/hoorn_4> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://metamatter.io/som/Bezetting> .