About: http://webisa.webdatacommons.org/388935936

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	A pure hydrocarbon is truly composed of only carbon and hydrogen atoms, while an impure one contains carbon and hydrogen atoms bonded to other atoms, such as nitrogen or sulfur.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org