( ( Gamma rays ) ( , ( ( like ( ( alphas and ) betas ) ) ( , ( ( come ( from ( ( the nucleus ) ( of ( a ( radioactive atom ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NNP Gamma) (NNS rays)) (, ,) (PP (IN like) (NP (NNS alphas) (CC and) (NNS betas))) (, ,) (VP (VBP come) (PP (IN from) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT a) (JJ radioactive) (NN atom)))))) (. .)))
Gamma rays, like alphas and betas, come from the nucleus of a radioactive atom.
(ROOT (S (NP (NP (JJ Radioactive) (NNS atoms)) (, ,) (NP (JJ nuclear) (NNS explosions)) (, ,) (CC and) (NP (NNS stars))) (VP (VBP produce) (NP (NN gamma) (NNS rays)))))
Radioactive atoms, nuclear explosions, and stars produce gamma rays