( ( ( ( ( Carbohydrates ( yield ( ( four calories ) ( per gram ) ) ) ) ( , ( ( proteins ( yield ( ( four calories ) ( per gram ) ) ) ) , ) ) ) and ) ( fats ( yield ( ( nine calories ) ( per gram ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Carbohydrates)) (VP (VBP yield) (NP (NP (CD four) (NNS calories)) (PP (IN per) (NP (NN gram)))))) (PRN (, ,) (S (NP (NNS proteins)) (VP (VBP yield) (NP (NP (CD four) (NNS calories)) (PP (IN per) (NP (NN gram)))))) (, ,)) (CC and) (S (NP (NNS fats)) (VP (VBP yield) (NP (NP (CD nine) (NNS calories)) (PP (IN per) (NP (NN gram)))))) (. .)))
Carbohydrates yield four calories per gram, proteins yield four calories per gram, and fats yield nine 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))))) (. .)))