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Anyway, according to the energy conservation laws we can
(ROOT (S (S (PP (VBG According) (PP (TO to) (NP (NP (DT the) (NN law)) (PP (IN of) (NP (NP (NN conservation)) (PP (IN of) (NP (NN energy)))))))) (, ,) (NP (NN energy)) (VP (MD can) (ADVP (RB never)) (ADVP (RB actually)) (VP (VB be) (`` ``) (VP (VBN consumed)))) ('' '')) (: ;) (S (NP (PRP it)) (VP (MD can) (ADVP (RB only)) (VP (VB be) (VP (VBN changed) (PP (IN from) (NP (CD one) (NN form))) (PP (TO to) (NP (DT another))))))) (. .)))