( ( ( A ( black hole ) ) ( orbiting ( another star ) ) ) ( ( might ( ( draw matter ) ( from ( the ( companion star ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (JJ black) (NN hole)) (VP (VBG orbiting) (NP (DT another) (NN star)))) (VP (MD might) (VP (VB draw) (NP (NN matter)) (PP (IN from) (NP (DT the) (NN companion) (NN star))))) (. .)))
A black hole orbiting another star might draw matter from the companion star.
(ROOT (S (NP (NP (DT The) (JJ tidal) (NNS forces)) (PP (IN near) (NP (JJ black) (NNS holes)))) (VP (VBP are) (ADJP (RB so) (JJ great) (SBAR (S (NP (PRP they)) (VP (MD can) (ADVP (RB actually)) (VP (VB tear) (NP (NN matter)) (PP (IN from) (NP (DT a) (NN companion) (NN star))))))))) (. .)))