( ( ( ( ( ( ( One gram ) ( of protein ) ) ( is ( equal ( to ( four calories ) ) ) ) ) , ) and ) ( ( ( 1 g ) ( of carbohydrates ) ) ( is ( equal ( to ( 4 calories ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (CD One) (NN gram)) (PP (IN of) (NP (NN protein)))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (CD four) (NNS calories)))))) (, ,) (CC and) (S (NP (NP (CD 1) (NN g)) (PP (IN of) (NP (NNS carbohydrates)))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (CD 4) (NNS calories)))))) (. .)))
One gram of protein is equal to four calories, and 1 g of carbohydrates is equal to 4 calories.
(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))))) (. .)))