( Neutron ( ( ( stars and ) ( pulsars ( ( A ( neutron star ) ) ( is ( ( the rest ) ( of ( ( the ( supernova explosion ) ) ( of ( a ( massive star ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Neutron)) (VP (VP (VBZ stars)) (CC and) (VP (VBZ pulsars) (SBAR (S (NP (DT A) (NN neutron) (NN star)) (VP (VBZ is) (NP (NP (DT the) (NN rest)) (PP (IN of) (NP (NP (DT the) (NN supernova) (NN explosion)) (PP (IN of) (NP (DT a) (JJ massive) (NN star))))))))))) (. .)))
Neutron stars and pulsars A neutron star is the rest of the supernova explosion of a massive star.
(ROOT (S (NP (NN Neutron) (NNS stars)) (VP (VBP are) (NP (NP (DT the) (NNS corpses)) (PP (IN of) (NP (ADJP (VBN left) (RP over)) (NN supernova) (NNS explosions))))) (. .)))