About: http://webisa.webdatacommons.org/61008634

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	R' can be linear or branched alkylene having about 2 30 carbon atoms, such as about 4 or 6 carbon atoms or any number therebetween, like ethylene, propylene, 1,2-butylene, 1,2-octadecylene, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com