( ( write ( ( -LRB- ( ' ( ( ( calorie ( A unit ) ) of ) measurement ) ) ) ( ( for ( the energy ) ) ( content ( of foods ) ) ) ) ) . )
(ROOT (S (VP (VB write) (SBAR (S (S (-LRB- -LRB-) (NP (POS ')) (ADVP (NP (NP (NN calorie)) (NP (DT A) (NN unit))) (IN of)) (VP (VBZ measurement))) (S (PP (IN for) (NP (DT the) (NN energy))) (VP (VB content) (PP (IN of) (NP (NNS foods)))))))) (. .)))
write(' calorie A unit of measurement for the energy content of foods.
(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.