<http://webisa.webdatacommons.org/concept/purify_air_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"purify" .
<http://webisa.webdatacommons.org/concept/purify_air_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"air" .
<http://webisa.webdatacommons.org/concept/purify_air_>	<http://www.w3.org/2000/01/rdf-schema#label>	"purify air" .