<http://webisa.webdatacommons.org/50524156>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/50524156>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/466274425>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/50524156> .
<http://webisa.webdatacommons.org/50524156>	<http://www.w3.org/ns/prov#value>	"Attached to an upper surface of the base extension 16 by conventional means such as nut and bolt combinations (which are not shown for simplicity) is a vertical support column 18." .