About: http://webisa.webdatacommons.org/10739977

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	U.S. Pat. No. 4,717,905 to Morrison Jr. discloses a warning system for monitoring a condition such as air.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es