About: http://webisa.webdatacommons.org/128074102

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	From the article I read today, here is an answer:As it turns out, expertise requires about ten years, or ten to twenty thousand hours of deliberate practice.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com