( ( The brain ) ( ( is ( ( the ( most ( energy ( intensive organ ) ) ) ) ( of ( the body ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN brain)) (VP (VBZ is) (NP (NP (DT the) (JJS most) (NN energy) (JJ intensive) (NN organ)) (PP (IN of) (NP (DT the) (NN body))))) (. .)))
The brain is the most energy intensive organ of the body.
(ROOT (S (NP (DT The) (NN brain)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ complex)) (NN organ)) (PP (IN in) (NP (DT the) (JJ human) (NN body))))) (. .)))