_:nb9c4e6d1b3884c248d07343a640c1854xb6
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/PropertyValueSpecification>
<https://jr.devries.frl/2009/09/11/braintraining-op-12-verschillende-manieren/>