<http://webisa.webdatacommons.org/prov/453986168>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/416669159> .
<http://webisa.webdatacommons.org/416669159>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/416669159>	<http://www.w3.org/ns/prov#value>	"Cork is a material which is excellently suited for the purpose concerned, but its enormous porosity and air content give rise to problems at the tile manufacture." .
<http://webisa.webdatacommons.org/416669159>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .