( ( ( One gram ) ( of carbohydrates ) ) ( ( provides ( ( four kilo-calories ) ( of energy ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (NN gram)) (PP (IN of) (NP (NNS carbohydrates)))) (VP (VBZ provides) (NP (NP (CD four) (NNS kilo-calories)) (PP (IN of) (NP (NN energy))))) (. .)))
One gram of carbohydrates provides four kilo-calories of energy.
(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))))) (. .)))