( ( Neutron ( Stars Astronomers ) ) ( now ( ( agree ( that ( pulsars ( ( are rapidly ) ( ( ( rotating ( neutron stars ) ) , ) ( ( ( one form ) ( for ( the ( stellar core ) ) ) ) ( that ( remains ( after ( a ( supernova outburst ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Neutron) (NNP Stars) (NNP Astronomers)) (ADVP (RB now)) (VP (VBP agree) (SBAR (IN that) (S (NP (NNS pulsars)) (VP (VBP are) (ADVP (RB rapidly)) (NP (NP (VBG rotating) (NN neutron) (NNS stars)) (, ,) (NP (NP (CD one) (NN form)) (PP (IN for) (NP (DT the) (JJ stellar) (NN core))) (SBAR (WHNP (WDT that)) (S (VP (VBZ remains) (PP (IN after) (NP (DT a) (NN supernova) (NN outburst)))))))))))) (. .)))
Neutron Stars Astronomers now agree that pulsars are rapidly rotating neutron stars, one form for the stellar core that remains after a supernova outburst.
(ROOT (S (NP (NP (DT The) (NN core)) (PP (IN of) (NP (DT a) (NN star)))) (VP (VBZ collapses) (PP (IN during) (NP (DT a) (NN supernova))) (, ,) (S (VP (VBG forming) (NP (DT a) (NN neutron) (NN star))))) (. .)))