Assertion: voyager | /r/HasProperty | launched by nasa
Facets:
value: on september
type: TEMPORAL
value: to study the outer solar system
type: PURPOSE
value: on august
type: TEMPORAL
Source sentences:
text: Voyager 1 is a space probe that was launched by NASA on September 5, 1977.
text: Voyager 2 is a space probe launched by NASA on August 20, 1977, to study the outer planets.
text: Voyager 1 is a 722-kilogram space probe launched by NASA on September 5, 1977 to study the outer Solar System.