About: http://webisa.webdatacommons.org/246007482

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The fixer solution may, if necessary, contain a preservative such as a sulfite or hydrogensulfite; a pH buffer such as acetic acid; a pH control agent such as sulfuric acid; and a water-softening chelating compound.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com