( ( ( ( ( ( Cells ( are ( living systems ) ) ) , ) and ) so ) ( are ( ( the ( various ( ( tissues and ) organs ) ) ) ( of ( ( ( the body ) , ) ( ( the ( human brain ) ) ( being ( the ( ( most complex ) example ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Cells)) (VP (VBP are) (VP (VBG living) (NP (NNS systems))))) (, ,) (CC and) (RB so) (S (VP (VBP are) (NP (NP (DT the) (JJ various) (NNS tissues) (CC and) (NNS organs)) (PP (IN of) (NP (NP (DT the) (NN body)) (, ,) (NP (NP (DT the) (JJ human) (NN brain)) (VP (VBG being) (NP (DT the) (ADJP (RBS most) (JJ complex)) (NN example))))))))) (. .)))
Cells are living systems, and so are the various tissues and organs of the body, the human brain being the most complex example.
(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))))) (. .)))