( ( ( ( ( Energy ( can ( be ( ( converted ( from ( one form ) ) ) ( to another ) ) ) ) ) , ) but ) ( energy ( ( can not ) ( be ( ( lost or ) destroyed ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Energy)) (VP (MD can) (VP (VB be) (VP (VBN converted) (PP (IN from) (NP (CD one) (NN form))) (PP (TO to) (NP (DT another))))))) (, ,) (CC but) (S (NP (NN energy)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN lost) (CC or) (VBN destroyed))))) (. .)))
Energy can be converted from one form to another, but energy cannot be lost or destroyed.
(ROOT (S (NP (NNP Energy) (PRP it)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN destroyed)))) (. .)))