About: http://webisa.webdatacommons.org/6533412

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	On the other hand, increasing the density can be easily done by using a heavy gas such as carbon dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com