<http://webisa.webdatacommons.org/prov/45821354>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/244437053> .
<http://webisa.webdatacommons.org/244437053>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/244437053>	<http://www.w3.org/ns/prov#value>	"Silver is affected by compounds such as sulfur dioxide and becomes tarnished when exposed to air containing them." .
<http://webisa.webdatacommons.org/244437053>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<questia.com> .