About: http://webisa.webdatacommons.org/78870021

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	it is hard and you need to have skills with e.g. 20yrs which even a professor do not have with 40yrs.
http://www.w3.org/ns/prov#wasQuotedFrom	usingenglish.com