About: http://webisa.webdatacommons.org/255515366

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	Secondhand smoke has been classified as a Group A Carcinogen, a known cause of cancer in humans, and contains 69 carcinogens including formaldehyde, cyanide, arsenic and carbon monoxide.
http://www.w3.org/ns/prov#wasQuotedFrom	starbulletin.com