( ( ( Protein and ) carbohydrates ) ( ( have ( ( the ( same ( energy ( value weight ) ) ) ) ( for ( ( weight , ) ( ( ( about four ) calories ) ( per gram ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Protein) (CC and) (NNS carbohydrates)) (VP (VBP have) (NP (NP (DT the) (JJ same) (NN energy) (NN value) (NN weight)) (PP (IN for) (NP (NP (NN weight)) (, ,) (NP (NP (QP (RB about) (CD four)) (NNS calories)) (PP (IN per) (NP (NN gram)))))))) (. .)))
Protein and carbohydrates have the same energy value weight for weight, about four calories per gram.
(ROOT (S (NP (NP (CD One) (NN gram)) (PP (IN of) (NP (NNS carbohydrates)))) (VP (VBZ provides) (NP (NP (CD four) (NNS calories)) (PP (IN of) (NP (NN energy))))) (. .)))