( Fat ( ( is ( ( ( ( the ( ( most concentrated ) source ) ) ( of ( energy ( in ( the diet ) ) ) ) ) , ) ( ( providing ( ( nine calories ) ( per gram ) ) ) ( compared ( with ( ( four calories ) ( per ( gram ( from ( ( ( either carbohydrates ) or ) protein ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Fat)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ concentrated)) (NN source)) (PP (IN of) (NP (NP (NN energy)) (PP (IN in) (NP (DT the) (NN diet))))) (, ,) (VP (VBG providing) (NP (NP (CD nine) (NNS calories)) (PP (IN per) (NP (NN gram)))) (PP (VBN compared) (PP (IN with) (NP (NP (CD four) (NNS calories)) (PP (IN per) (NP (NP (NN gram)) (PP (IN from) (NP (NP (DT either) (NNS carbohydrates)) (CC or) (NP (NN protein)))))))))))) (. .)))
Fat is the most concentrated source of energy in the diet, providing nine calories per gram compared with four calories per gram from either carbohydrates or protein.
(ROOT (S (NP (NP (CD One) (NN gram)) (PP (IN of) (NP (NNS proteins)))) (VP (VBZ provides) (NP (NP (CD four) (NNS calories)) (PP (IN of) (NP (NN energy))))) (. .)))