( Plants ( ( need ( ( the ( sun 's ) ) ( energy ( to ( manufacture ( their food ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Plants)) (VP (VBP need) (NP (NP (DT the) (NN sun) (POS 's)) (NN energy) (S (VP (TO to) (VP (VB manufacture) (NP (PRP$ their) (NN food))))))) (. .)))
Plants need the sun's energy          to manufacture their food.
(ROOT (S (NP (NNS Animals)) (VP (VBP need) (NP (NP (NNS plants)) (PP (IN for) (NP (NN food) (CC and) (NN energy))))) (. .)))