About: http://webisa.webdatacommons.org/330491829

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	Research indicates that precise levels of vitamin D need to be in the bloodstream to prevent conditions such as rickets, or softening of the bones.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov