( ( earth ( , ( energy ( source ( normal ( sunlight ( , ( big ( food ( internet origin ) ) ) ) ) ) ) ) ) ) ( photosynthesis . ) )
(ROOT (S (NP (NN earth) (, ,) (NN energy) (NN source) (JJ normal) (NN sunlight) (, ,) (JJ big) (NN food) (NN internet) (NN origin)) (VP (VBZ photosynthesis)) (. .)))
earth, energy source normal sunlight, big food internet origin photosynthesis.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (NN food) (POS 's)) (NN chemical) (NN energy)))) (ADVP (RB ultimately)) (VP (VBZ comes) (PP (IN from) (NP (NN sunlight)))) (. .)))