About: http://webisa.webdatacommons.org/362049475

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	There are, of course, kinds of labor where the work must be purely mental,
http://www.w3.org/ns/prov#wasQuotedFrom	usa-presidents.info