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<http://webisa.webdatacommons.org/246156190>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/246156190>	<http://www.w3.org/ns/prov#value>	"The aforementioned +/???first-order diffracted light may also be used to generate a so-called sub-beam for detecting signals such as tracking error or crosstalk canceling signals to radiate the information medium 9." .
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