The system could be used on a small, unmanned craft that would collect soil and rock samples from the planet, make its own fuel and take off to rendezvous with a mother ship orbiting the planet, which would then return it to Earth.
(a small, unmanned craft; would collect; soil and rock samples) (a mother ship orbiting the planet; would return; it; to Earth; T:then)
a small, unmanned craft a mother ship orbiting the planet
would collect would return
soil and rock samples
it to Earth T:then