<http://webisa.webdatacommons.org/prov/158840916>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/326184161> .
<http://webisa.webdatacommons.org/prov/485067015>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/326184161> .
<http://webisa.webdatacommons.org/326184161>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nzdl.org> .
<http://webisa.webdatacommons.org/326184161>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/326184161>	<http://www.w3.org/ns/prov#value>	"such factors as length of the wall, materials used, depth of the impermeable" .