<https://data.muziekschatten.nl/som/bed74c4ecc0667e994b57d9ba890dc90> <http://schema.org/keywords> "P.J. Troelstra" .
<https://data.muziekschatten.nl/som/bed74c4ecc0667e994b57d9ba890dc90> <http://schema.org/name> "P.J. Troelstra" .
<https://data.muziekschatten.nl/som/bed74c4ecc0667e994b57d9ba890dc90> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://schema.org/Person> .