About: http://webisa.webdatacommons.org/88600273

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	Part of it is that they are in an urban environment with less exposure to the sun, but because vitamin D is a fat-soluble vitamin, they do not have high levels, Doyle says.
http://www.w3.org/ns/prov#wasQuotedFrom	hss.edu