PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Since darker skin pigment reduces the skin's ability to synthesize vitamin D by 95%, darker skinned people need 5-10 times as much sun exposure to synthesize enough vitamin D. As long as sun exposure is for short periods of time it will not increase the risk of serious skin cancer such as melanoma.
http://www.w3.org/ns/prov#wasQuotedFrom
  • healthylivingdoc.com