About: http://webisa.webdatacommons.org/197827166

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' is ethylene or a mixture of ethylene and higher alkylene such as propylene with relatively more ethylene than propylene, preferably at least 60 percent ethylene;
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk