<http://webisa.webdatacommons.org/prov/30144131>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/11538667> .
<http://webisa.webdatacommons.org/11538667>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/11538667>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/11538667>	<http://www.w3.org/ns/prov#value>	"FIG. 3A is a block diagram showing a concrete example of the optical amplifier shown in FIG. 2." .