About: http://webisa.webdatacommons.org/179501628

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	Subject is a smoker, occasional smoker or has a history of smoking (or use of any tobacco) within the last 3 months
http://www.w3.org/ns/prov#wasQuotedFrom	clinicaltrials.gov