About: http://webisa.webdatacommons.org/34609533

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 windows may be formed of a material such as sapphire which is substantially transparent to the optical energy from source 24 over the range of wavelengths to be used for analyzing the gas mixture.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es