The Moon may have formed when a large planetesimal collided with the early Earth, stripping it of some mantle material which then coalesced to form the Moon.
(The Moon; may have formed; T:when a large planetesimal collided with the early Earth; stripping it of some mantle material) (a large planetesimal; collided; with the early Earth) (some mantle material; coalesced; to form the Moon; T:then) Context(some mantle material coalesced,List([98, 139))):(some mantle material; coalesced to form; the Moon)
some mantle material coalesced,List([98, 139))
The Moon a large planetesimal some mantle material some mantle material
may have formed collided coalesced coalesced to form
T:when a large planetesimal collided with the early Earth stripping it of some mantle material
with the early Earth
to form the Moon T:then
the Moon