About: http://webisa.webdatacommons.org/309958153

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	NASA has a spacecraft called Gravity Probe B that is examining a subtlety known as the Lense-Thirring effect that produces a small force as space-time is twisted by a spinning mass, such as a rotating planet.
http://www.w3.org/ns/prov#wasQuotedFrom	keelynet.com