( ( ( In order ) ( to ( have ( an energy ) ) ) ) ( , ( ( the voltage ) ( ( must ( be ( multiplied ( by ( a charge ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN In) (NN order) (S (VP (TO to) (VP (VB have) (NP (DT an) (NN energy)))))) (, ,) (NP (DT the) (NN voltage)) (VP (MD must) (VP (VB be) (VP (VBN multiplied) (PP (IN by) (NP (DT a) (NN charge)))))) (. .)))
In order to have an energy, the voltage must be multiplied by a charge.
(ROOT (S (NP (NNP Voltage)) (VP (VP (VBZ is) (RB not) (NP (NP (DT the) (JJ same)) (PP (IN as) (NP (NN energy))))) (, ,) (CC but) (VP (VBZ means) (NP (NP (DT the) (NN energy)) (PP (IN per) (NP (NN unit) (NN charge)))))) (. .)))