About: http://webisa.webdatacommons.org/129045278

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	Although these oils and rubbers are present in the prior art types of polypropylene, they can be extracted from the more crystalline polypropylene by suitable extraction methods.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com