About: http://webisa.webdatacommons.org/335339628

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 contains more than 4,000 chemicals, including at least 69 carcinogens.
http://www.w3.org/ns/prov#wasQuotedFrom	in.gov