( They ( ( may ( ( be ( surprised ( to ( know ( that ( sugar ( ( contains ( 4 calories ) ) ( to ( the gram ) ) ) ) ) ) ) ) ) ( while ( bread ( has ( ( ( only 2 ) calories ) ( per gram ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (MD may) (VP (VB be) (ADJP (JJ surprised) (S (VP (TO to) (VP (VB know) (SBAR (IN that) (S (NP (NN sugar)) (VP (VBZ contains) (NP (CD 4) (NNS calories)) (PP (TO to) (NP (DT the) (NN gram)))))))))) (SBAR (IN while) (S (NP (NN bread)) (VP (VBZ has) (NP (NP (QP (RB only) (CD 2)) (NNS calories)) (PP (IN per) (NP (NN gram))))))))) (. .)))
They may be surprised to know that sugar contains 4 calories to the gram while bread has only 2 calories per gram.
(ROOT (S (NP (NP (CD One) (NN gram)) (PP (IN of) (NP (NN sugar) (CC or) (NN starch)))) (VP (VBZ provides) (NP (NP (CD 4) (NNS calories)) (PP (IN of) (NP (NN energy))))) (. .)))