( ( ( ( Supernovae and ) neutron ) ( star production ) ) . )
(ROOT (NP (NP (NN Supernovae) (CC and) (NN neutron)) (NP (NN star) (NN production)) (. .)))
Supernovae and neutron star production.
(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))))) (. .)))