( ( assess ( ( the ( calorie content ) ) ( of ( ( a food ) ( -LRB- ( ( 78 % ) -RRB- ) ) ) ) ) ) ; )
(ROOT (S (VP (VB assess) (NP (NP (DT the) (JJ calorie) (NN content)) (PP (IN of) (NP (NP (DT a) (NN food)) (PRN (-LRB- -LRB-) (NP (CD 78) (NN %)) (-RRB- -RRB-)))))) (: ;)))
assess the calorie content of a food (78%);
(ROOT (S (NP (NP (DT The) (NN energy) (NN content)) (PP (IN of) (NP (NNS foods)))) (VP (VBZ is) (ADVP (RB often)) (VP (VBN expressed) (PP (IN in) (NP (NNS calories))))) (. .)))
The energy content of foods is often expressed in calories.