About: http://webisa.webdatacommons.org/172101519

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 mass fraction of the alkali metal and alkaline earth metal oxides includes all values and subvalues therebetween, especially including 0.5, 1, 5, 10, 15, 20, 25% by weight.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com