<http://schema.org/free>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#Property> .
<http://schema.org/free>	<http://www.w3.org/2000/01/rdf-schema#label>	"free" .
<http://schema.org/free>	<http://schema.org/rangeIncludes>	<http://schema.org/Boolean> .
<http://schema.org/free>	<http://www.w3.org/2000/01/rdf-schema#comment>	"A flag to signal that the publication is accessible for free." .
<http://schema.org/free>	<http://schema.org/domainIncludes>	<http://schema.org/PublicationEvent> .