About: http://webisa.webdatacommons.org/148357354

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	Here, it is desired that the alkali metal silicates have an SiO2/M2O ratio, wherein M is an alkali metal, of from 0.5 to 3.2, preferably from 1.5 to 2.6.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com