<http://webisa.webdatacommons.org/prov/20865019>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/421036320> .
<http://webisa.webdatacommons.org/421036320>	<http://www.w3.org/ns/prov#value>	"Once in the air, pilots and passengers were pretty much on their own; there were nearly no safety, technical, engineering, traffic control or other regulations." .
<http://webisa.webdatacommons.org/421036320>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/421036320>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<phys.org> .
<http://webisa.webdatacommons.org/prov/312919154>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/421036320> .
<http://webisa.webdatacommons.org/prov/245763777>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/421036320> .