<http://webisa.webdatacommons.org/prov/17382233>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/82245493> .
<http://webisa.webdatacommons.org/82245493>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/122776852>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/82245493> .
<http://webisa.webdatacommons.org/82245493>	<http://www.w3.org/ns/prov#value>	"Most often, stains are metals such as iron, copper or manganese." .
<http://webisa.webdatacommons.org/82245493>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<backyardcitypools.com> .