About: http://webisa.webdatacommons.org/369538620

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	Also, more than 4 thousand different compounds have been identified in tobacco and cigarette smoke, including heavy metals, such as lead or cadmium, and formaldehyde[28].
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov