About: http://webisa.webdatacommons.org/425072403

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 are a biological response to environmental toxins, such as cigarette smoke, chemicals, sunlight, cosmic and manmade radiation, and even a key feature of pharmaceutical drugs.
http://www.w3.org/ns/prov#wasQuotedFrom	mercola.com