(S (S (NP (BASENP (NN Fusion)) (PP (IN of) (BASENP (NN two) (NN deuterium) (NNS nuclei)))) (VP (VBZ results) (PP (IN in) (NP (BASENP (DT the) (NN emission)) (PP (IN of) (NP (NP (NP (BASENP (NN helium) (NNS nuclei)) (PRN (LRB -LRB-) (BASENP (NN alpha) (NNS particles)) (RRB -RRB-))) (COMMA ,) (BASENP (NNS neutrons))) (CC and) (BASENP (NN gamma) (NNS rays)))))))) (PERIOD .))