( ( In ( the ( nutritional literature ) ) ) ( , ( ( ( the ( energy content ) ) ( of foods ) ) ( ( ( ( ( ( ( is , ) ( by convention ) ) , ) ( expressed ( in Calories ) ) ) ( -LRB- ( ( note ( the ( capital ( `` ( C '' ) ) ) ) ) -RRB- ) ) ) ( as ( ( opposed ( to ( ( the use ) ( of ( ( ( calories or ) kilojoules ) ( -LRB- ( kj -RRB- ) ) ) ) ) ) ) ( in ( the ( scientific literature ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ nutritional) (NN literature))) (, ,) (NP (NP (DT the) (NN energy) (NN content)) (PP (IN of) (NP (NNS foods)))) (VP (VBZ is) (, ,) (PP (IN by) (NP (NN convention))) (, ,) (S (VP (VBN expressed) (PP (IN in) (NP (NNP Calories)))))) (PRN (-LRB- -LRB-) (VP (VB note) (NP (DT the) (NN capital) (`` ``) (NNP C) ('' ''))) (-RRB- -RRB-)) (SBAR (IN as) (S (VP (VBD opposed) (PP (TO to) (NP (NP (DT the) (NN use)) (PP (IN of) (NP (NP (NNS calories) (CC or) (NNS kilojoules)) (PRN (-LRB- -LRB-) (NP (NN kj)) (-RRB- -RRB-)))))) (PP (IN in) (NP (DT the) (JJ scientific) (NN literature)))))) (. .)))
In the nutritional literature, the energy content of foods is, by convention, expressed in Calories (note the capital &quot;C&quot;) as opposed to the use of calories or kilojoules (kj) in the scientific literature.
(ROOT (S (NP (DT A) (NN calorie)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB express) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN energy)))) (PP (IN in) (NP (NN food)))))))) (. .)))
A calorie is used to express the amount of energy in food.