<http://webisa.webdatacommons.org/prov/338510887>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/100478542> .
<http://webisa.webdatacommons.org/100478542>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/100478542>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<lef.org> .
<http://webisa.webdatacommons.org/prov/186286077>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/100478542> .
<http://webisa.webdatacommons.org/100478542>	<http://www.w3.org/ns/prov#value>	"These damaging substances are produced by the body during normal and extraordinary metabolic reactions, and their levels can rise in response to sunlight, cigarette smoke, and other substances." .