<http://webisa.webdatacommons.org/prov/472243786>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/263139508> .
<http://webisa.webdatacommons.org/263139508>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/263139508>	<http://www.w3.org/ns/prov#value>	"Vitamin A is an essential nutrient, required for normal vision and for healthy skin and mucous membranes." .
<http://webisa.webdatacommons.org/263139508>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nutritionaltree.com> .