<http://webisa.webdatacommons.org/prov/6301357>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/135641579> .
<http://webisa.webdatacommons.org/135641579>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/135641579>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nasa.gov> .
<http://webisa.webdatacommons.org/135641579>	<http://www.w3.org/ns/prov#value>	"They noted, for example, that on occasion dark and light grains of sand formed lines or other patterns that stood out against the background." .