About: http://webisa.webdatacommons.org/189027363

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	For such powders as tin, zinc, aluminium, and the like, use can be made of air, an air/helium mixture in various proportions may be used for nickel, iron, cobalt, and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk