About: http://webisa.webdatacommons.org/6053575

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	In order to introduce the light beam from the light-transmitting section into the optical system so that the light beam does not pass through the gas, a medium other than the gas may be intervened as described above.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com