<http://webisa.webdatacommons.org/151422541>	<http://www.w3.org/ns/prov#value>	"systems, such as the vacuum." .
<http://webisa.webdatacommons.org/151422541>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/388351870>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/151422541> .
<http://webisa.webdatacommons.org/151422541>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<flightgear.org> .