About: http://webisa.webdatacommons.org/110781758

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	The very slight quantity of mercury vapor present in cold hydrogen under pressure can be further removed in 7 by known techniques such as chlorine water scrubbing, adsorption and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com