<http://webisa.webdatacommons.org/249775521>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/231790165>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/249775521> .
<http://webisa.webdatacommons.org/249775521>	<http://www.w3.org/ns/prov#value>	"FIG. 20A is a block diagram of an example of a filter graph." .
<http://webisa.webdatacommons.org/249775521>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .