About: http://webisa.webdatacommons.org/78904858

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	?????? ??? ?????? Air monitoring and detection can be used to determine the presence or absence of hydrogen sulfide, hydrogen cyanide, chlorine gas or other materials.
http://www.w3.org/ns/prov#wasQuotedFrom	officer.com