<http://webisa.webdatacommons.org/prov/156183208>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/270198813> .
<http://webisa.webdatacommons.org/270198813>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/270198813>	<http://www.w3.org/ns/prov#value>	"In an optical communication system, for example, it is often necessary to quickly toggle a light source, such as a laser diode, to produce light pulses that are used as communication signals." .
<http://webisa.webdatacommons.org/270198813>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .