<http://webisa.webdatacommons.org/183633187>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/183633187>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/183633187>	<http://www.w3.org/ns/prov#value>	"However, when a varying fuel such as refuse is burned or there are changes in the combustion, the composition of the smoke changes requiring corresponding changes in the magnitude of the electrostatic field." .
<http://webisa.webdatacommons.org/prov/495107639>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/183633187> .