<http://webisa.webdatacommons.org/prov/468905778>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/420028463> .
<http://webisa.webdatacommons.org/420028463>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nasa.gov> .
<http://webisa.webdatacommons.org/420028463>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/93252698>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/420028463> .
<http://webisa.webdatacommons.org/420028463>	<http://www.w3.org/ns/prov#value>	"Unknown masses can be such things as nuts and bolts, washers, and pebbles." .