<https://data.muziekschatten.nl/som/dc2a57e1a3364e622492f9b31fb4ca6d> <http://schema.org/keywords> "J. Portengen" .
<https://data.muziekschatten.nl/som/dc2a57e1a3364e622492f9b31fb4ca6d> <http://schema.org/name> "J. Portengen" .
<https://data.muziekschatten.nl/som/dc2a57e1a3364e622492f9b31fb4ca6d> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://schema.org/Company> .