<http://webisa.webdatacommons.org/prov/160730150>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/421704967> .
<http://webisa.webdatacommons.org/421704967>	<http://www.w3.org/ns/prov#value>	"Unfortunately, most of the methods that are available at this point are not refined enough to help people working at more advanced levels." .
<http://webisa.webdatacommons.org/421704967>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/421704967>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nfb.org> .