About: http://webisa.webdatacommons.org/123762613

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	Darwin himself stated, Naturalists continually refer to external conditions, such as climate, food, etc., as the only possible cause of variation.
http://www.w3.org/ns/prov#wasQuotedFrom	evcforum.net