About: http://webisa.webdatacommons.org/143967358

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Free radicals, which may be produced by the body or generated by environmental conditions, such as exposure to ultraviolet light and tobacco smoke, contain an unpaired electron and thus are highly reactive.
http://www.w3.org/ns/prov#wasQuotedFrom	newworldencyclopedia.org