<http://webisa.webdatacommons.org/13689712>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/13689712>	<http://www.w3.org/ns/prov#value>	"When the photosensitive material comprises a silver halide, the physical developers can comprise a solution of an amplifying metal ion, e.g. silver, copper, tin and like ions with a reducing agent therefor, or the physical developer can comprise a silver reducing agent and a solvent for the silver halide." .
<http://webisa.webdatacommons.org/prov/406961191>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/13689712> .
<http://webisa.webdatacommons.org/13689712>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .