<http://webisa.webdatacommons.org/prov/420288602>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/69002809> .
<http://webisa.webdatacommons.org/69002809>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/289522657>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/69002809> .
<http://webisa.webdatacommons.org/69002809>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nfb.org> .
<http://webisa.webdatacommons.org/69002809>	<http://www.w3.org/ns/prov#value>	"You can begin with a substance such as sand or gravel." .