<http://webisa.webdatacommons.org/concept/wastewater+treatment+plant_sludge_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"sludge" .
<http://webisa.webdatacommons.org/concept/wastewater+treatment+plant_sludge_>	<http://www.w3.org/2000/01/rdf-schema#label>	"wastewater treatment plant sludge" .
<http://webisa.webdatacommons.org/concept/wastewater+treatment+plant_sludge_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"wastewater treatment plant" .