<http://webisa.webdatacommons.org/concept/_vol_20>	<http://webisa.webdatacommons.org/ontology#hasPostModifier>	"20" .
<http://webisa.webdatacommons.org/concept/_vol_20>	<http://www.w3.org/2000/01/rdf-schema#label>	"vol 20" .
<http://webisa.webdatacommons.org/concept/_vol_20>	<http://webisa.webdatacommons.org/ontology#hasHead>	"vol" .