<http://webisa.webdatacommons.org/161912554>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/161912554>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<issuu.com> .
<http://webisa.webdatacommons.org/prov/85743900>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/161912554> .
<http://webisa.webdatacommons.org/161912554>	<http://www.w3.org/ns/prov#value>	"Issues such as fuel burn at ground level as well as in the air, the number of flight sectors and flying altitude are also taken into account." .