( ( Since ( mass ( is ( ( only one ) ( of ( ( the forms ) ( of ( energy ( , ( ( matter and ) energy ) ) ) ) ) ) ) ) ) ) ( ( ( ( ( can neither ) ( be created ) ) nor ) destroyed ) . ) )
(ROOT (S (SBAR (IN Since) (S (NP (NN mass)) (VP (VBZ is) (NP (NP (QP (RB only) (CD one))) (PP (IN of) (NP (NP (DT the) (NNS forms)) (PP (IN of) (NP (NN energy) (, ,) (NN matter) (CC and) (NN energy))))))))) (VP (VP (MD can) (RB neither) (VP (VB be) (VP (VBN created)))) (CC nor) (VP (VBD destroyed))) (. .)))
Since mass is only one of the forms of energy, matter and energy can neither be created nor destroyed.
(ROOT (S (NP (NNP Energy) (PRP it)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN destroyed)))) (. .)))