About: http://webisa.webdatacommons.org/227786167

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	After operating both lamps for a shorter period of time as described, lamp 108 is operated for a longer period of time, such as 1???2 hours or so, which lowers ozone levels and provides germicidal ultraviolet radiation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com