( ( Like protein ) ( , ( ( ( one gram ) ( of carbohydrate ) ) ( ( converts ( into ( four calories ) ) ) . ) ) ) )
(ROOT (S (PP (IN Like) (NP (NN protein))) (, ,) (NP (NP (CD one) (NN gram)) (PP (IN of) (NP (NN carbohydrate)))) (VP (VBZ converts) (PP (IN into) (NP (CD four) (NNS calories)))) (. .)))
Like protein, one gram of carbohydrate converts into four calories.
(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))))) (. .)))