About: http://webisa.webdatacommons.org/288029371

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	These include formaldehyde, nicotine, tar, and carbon monoxide, ammonia, cyanide, arsenic, and DDT. Here is an example of tar, a mixture of substances that together form a sticky mass in the lungs.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com