( ( In ( ( ( a storm ) ( of ( ( x-rays and ) temperatures ) ) ) ( reaching ( millions ( of degrees ) ) ) ) ) ( , ( it ( ( ( transfers matter ) ( to ( ( ( its ( compact companion ) ) , ) ( which ( can ( be ( either ( ( ( a ( neutron star ) ) or ) ( a ( black hole ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (S (NP (NP (DT a) (NN storm)) (PP (IN of) (NP (NNS x-rays) (CC and) (NNS temperatures)))) (VP (VBG reaching) (NP (NP (NNS millions)) (PP (IN of) (NP (NNS degrees))))))) (, ,) (NP (PRP it)) (VP (VBZ transfers) (NP (NN matter)) (PP (TO to) (NP (NP (PRP$ its) (JJ compact) (NN companion)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB be) (NP (CC either) (NP (DT a) (NN neutron) (NN star)) (CC or) (NP (DT a) (JJ black) (NN hole)))))))))) (. .)))
In a storm of x-rays and temperatures reaching millions of degrees, it transfers matter to its compact companion, which can be either a neutron star or a black hole.
(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))))))))) (. .)))