About: http://webisa.webdatacommons.org/172903184

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	Our present time system of days, hours, minutes, and seconds is a blend of these two systems.
http://www.w3.org/ns/prov#wasQuotedFrom	nasa.gov