About: http://webisa.webdatacommons.org/44812874

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	For these reasons it is not desirable to have electrical systems, or other apparatus vulnerable to breakage, in the mask.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com