Assertion: spacecraft's velocity | /r/HasProperty | needed by spacecraft
Facets:
value: to escape earth's gravity
type: PURPOSE
Source sentences:
text: It provides the velocity needed by a spacecraft to escape Earth's gravity and set it on its course for Mars.
text: A launch vehicle provides the velocity needed by a spacecraft to escape Earth's gravity and set it on its course for Mars.
text: A launch vehicle provides the velocity needed by a spacecraft to escape Earth's gravity and set it on its course for Mars.