He showed that the sodium tail was part of the dust tail, which most likely is caused by sodium being released from dust particles.
(the dust tail; most likely is caused; by sodium being released from dust particles) (sodium; being released; from dust particles) (He; showed; that the sodium tail was part of the dust tail) Context(He showed,List([0, 9))):(the sodium tail; was; part of the dust tail)
He showed,List([0, 9))
the dust tail sodium He the sodium tail
most likely is caused being released showed was
by sodium being released from dust particles
from dust particles
that the sodium tail was part of the dust tail
part of the dust tail