About: http://webisa.webdatacommons.org/111143836

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	Hydrogen sulphide is a naturally occuring chemical that is lethal, many useful medicines are artificially built by pharmaceutical chemists.
http://www.w3.org/ns/prov#wasQuotedFrom	fineartamerica.com