About: http://webisa.webdatacommons.org/157443048

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	R3 to R8 can independently have the structure CnHm, where n is an integer of about 2???20, and m is an integer of about 2???40.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk