<http://webisa.webdatacommons.org/prov/406961191>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/112811532> .
<http://webisa.webdatacommons.org/112811532>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/112811532>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/112811532>	<http://www.w3.org/ns/prov#value>	"The reaction mixture may optionally contain metal ions, such as copper, nickel or iron ions or combinations thereof." .