( ( ( The Birth ) ( of ( Neutron Stars ) ) ) ( ( Besides ( the ( interstellar debris ) ) ) ( , ( ( supernova explosions ) ( often ( ( leave ( behind ( ( ( ( ( a cinder ) , ) ( ( the ( star 's ) ) ( dense ( , ( collapsed ( neutron core ) ) ) ) ) ) , ) ( which ( was ( created ( by ( ( the compression ) ( of ( ( electrons and ) protons ) ) ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (NP (NP (DT The) (NNP Birth)) (PP (IN of) (NP (NNP Neutron) (NNP Stars)))) (PP (IN Besides) (NP (DT the) (NN interstellar) (NN debris))) (, ,) (NP (NN supernova) (NNS explosions)) (ADVP (RB often)) (VP (VBP leave) (PP (IN behind) (NP (NP (DT a) (NN cinder)) (, ,) (NP (NP (DT the) (NN star) (POS 's)) (JJ dense) (, ,) (JJ collapsed) (NN neutron) (NN core)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBN created) (PP (IN by) (NP (NP (DT the) (NN compression)) (PP (IN of) (NP (NNS electrons) (CC and) (NNS protons)))))))))))) (. .)))
The Birth of Neutron Stars Besides the interstellar debris, supernova explosions often leave behind a cinder, the star's dense, collapsed neutron core, which was created by the compression of electrons and protons.
(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))))) (. .)))