About: http://webisa.webdatacommons.org/91253472

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	Interpretive Summary: Vitamin D deficiency is a problem in some areas of the US where sun exposure is minimal, particularly in the winter, and thus minimizes dermal vitamin D synthesis.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov