About: http://webisa.webdatacommons.org/369382468

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	Because the sodium ionizes at relatively high temperature, the lamps usually include a gas such as neon or xenon which ionizes readily and forms an initial arc.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com