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<http://webisa.webdatacommons.org/prov/13990329>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/335785850> .
<http://webisa.webdatacommons.org/335785850>	<http://www.w3.org/ns/prov#value>	"Free radicals are found in the skin because of exposure to toxins such as air pollution and cigarette smoking, as well as to UV rays." .
<http://webisa.webdatacommons.org/prov/38069200>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/335785850> .
<http://webisa.webdatacommons.org/335785850>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<drskinspa.com> .