<http://webisa.webdatacommons.org/444912639>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nasa.gov> .
<http://webisa.webdatacommons.org/444912639>	<http://www.w3.org/ns/prov#value>	"Sometimes the gas is burned because it is contaminated with mud or other substances." .
<http://webisa.webdatacommons.org/prov/262664881>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/444912639> .
<http://webisa.webdatacommons.org/444912639>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .