<http://webisa.webdatacommons.org/193667921>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<phys.org> .
<http://webisa.webdatacommons.org/prov/62063773>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/193667921> .
<http://webisa.webdatacommons.org/193667921>	<http://www.w3.org/ns/prov#value>	"They would be built by pumping sand atop some hard base made of rock, concrete or other material." .
<http://webisa.webdatacommons.org/prov/454987692>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/193667921> .
<http://webisa.webdatacommons.org/193667921>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .