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<http://webisa.webdatacommons.org/prov/62365816>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/61756194> .
<http://webisa.webdatacommons.org/61756194>	<http://www.w3.org/ns/prov#value>	"These windows are preferably made of a material such as calcium fluoride (CaF2), sapphire, or other material that will pass light of all wavelengths of interest with little or no attenuation." .
<http://webisa.webdatacommons.org/prov/455893076>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/61756194> .
<http://webisa.webdatacommons.org/61756194>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .