( ( The ( human brain ) ) ( ( is ( the ( ( most selfish ) ( human organ ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ human) (NN brain)) (VP (VBZ is) (NP (DT the) (ADJP (RBS most) (JJ selfish)) (JJ human) (NN organ))) (. .)))
The human brain is the most selfish human organ.
(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))))) (. .)))