About: http://webisa.webdatacommons.org/16783913

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	In two other studies of mostly non-smoking men and women, beta carotene didn't have an effect on cancer risk either way (here and here).
http://www.w3.org/ns/prov#wasQuotedFrom	cancer.org