<http://webisa.webdatacommons.org/concept/group_material_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"material" .
<http://webisa.webdatacommons.org/concept/group_material_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"group" .
<http://webisa.webdatacommons.org/concept/group_material_>	<http://www.w3.org/2000/01/rdf-schema#label>	"group material" .