About: http://webisa.webdatacommons.org/405789947

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	These problems have been particularly troublesome because the apparatus used to solve them must fit within the confines of an electric light bulb and must not unduly raise the costs of manufacturing the light bulb.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com