<http://webisa.webdatacommons.org/274727076>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/prov/63969187>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/274727076> .
<http://webisa.webdatacommons.org/prov/426357826>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/274727076> .
<http://webisa.webdatacommons.org/274727076>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/274727076>	<http://www.w3.org/ns/prov#value>	"Other materials, such as polypropylene and polyethylene, may be, for example, exposed to ozone followed by heating to introduce the needed hydroxyl functionality." .