<http://webisa.webdatacommons.org/252082900>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/252082900>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/252082900>	<http://www.w3.org/ns/prov#value>	"These units usually have a reducing agent, such as urea, to enhance the conversion efficiency." .
<http://webisa.webdatacommons.org/prov/89919609>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/252082900> .