Assertion: moon | /r/HasProperty | mapped by lunar prospector
Facets:
value: in 1999
type: TEMPORAL
value: in the summer of 1994
type: TEMPORAL
value: very extensively
type: DEGREE
Source sentences:
text: In the summer of 1994, the Moon was very extensively mapped by the little spacecraft Clementine and again in 1999 by Lunar Prospector.