<http://webisa.webdatacommons.org/prov/74520504>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/301513342> .
<http://webisa.webdatacommons.org/301513342>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/301513342>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wisegeek.com> .
<http://webisa.webdatacommons.org/prov/500437771>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/301513342> .
<http://webisa.webdatacommons.org/301513342>	<http://www.w3.org/ns/prov#value>	"Water is considered ???hard??? when it has a high concentration of dissolved minerals such as calcium, magnesium, gypsum, and other salts." .