<http://webisa.webdatacommons.org/concept/_class_on+material>	<http://webisa.webdatacommons.org/ontology#hasPostModifier>	"on material" .
<http://webisa.webdatacommons.org/concept/_class_on+material>	<http://www.w3.org/2000/01/rdf-schema#label>	"class on material" .
<http://webisa.webdatacommons.org/concept/_class_on+material>	<http://webisa.webdatacommons.org/ontology#hasHead>	"class" .