( ( On average ) ( , ( ( ( a ( four ounce ) ) ( serving ( of sushi ) ) ) ( ( contains ( ( ( ( ( ( about 225 ) calories ) , ) ( ( five grams ) ( of protein ) ) ) and ) ( ( ( less ( than one ) ) gram ) ( of fat ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN On) (NP (NN average))) (, ,) (NP (NP (DT a) (CD four) (NN ounce)) (VP (VBG serving) (PP (IN of) (NP (NN sushi))))) (VP (VBZ contains) (NP (NP (QP (RB about) (CD 225)) (NNS calories)) (, ,) (NP (NP (CD five) (NNS grams)) (PP (IN of) (NP (NN protein)))) (CC and) (NP (NP (QP (JJR less) (IN than) (CD one)) (NN gram)) (PP (IN of) (NP (NN fat)))))) (. .)))
On average, a four ounce serving of sushi contains about 225 calories, five  grams of protein and less than one gram of fat.
(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))))) (. .)))