About: http://webisa.webdatacommons.org/429926341

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	Preferred precursors include the above species containing aromatic rings, especially the aromatic hydrocarbons such as tars, pitches, and other petroleum products or fractions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com