About: http://webisa.webdatacommons.org/439934876

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	The main causes of external tooth yellowing are smoking, foods with tannins, coffee, tea, carrots, oranges, and other foods.
http://www.w3.org/ns/prov#wasQuotedFrom	aacd.com