About: http://webisa.webdatacommons.org/292653582

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	Optionally, ions of at least one transition metal, such as copper ions, may be added to the compositions described herein.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es