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<http://webisa.webdatacommons.org/4539824>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<signalscv.com> .
<http://webisa.webdatacommons.org/4539824>	<http://www.w3.org/ns/prov#value>	"Hydrogen fluoride is a colorless gas with a sharp, pungent, irritating odor, according to the U.S. Environmental Protection Agency." .
<http://webisa.webdatacommons.org/prov/350000481>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/4539824> .