About: http://webisa.webdatacommons.org/146441561

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	However, even in such a case, since the signal light level becomes very small, there is a drawback such that it is also similarly difficult to keep the communication reliability according to the conventional transmission systems.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com