( Echinoderms ( ( lack ( ( ( ( ( ( complex respiratory ) , ) excretory ) , ) and ) ( circulatory systems ) ) ) . ) )
(ROOT (S (NP (NNS Echinoderms)) (VP (VBP lack) (NP (NP (JJ complex) (NN respiratory)) (, ,) (NP (NN excretory)) (, ,) (CC and) (NP (JJ circulatory) (NNS systems)))) (. .)))
Echinoderms lack complex respiratory, excretory, and circulatory systems.
(ROOT (S (NP (NNS Echinoderms)) (VP (VBP possess) (NP (DT a) (JJ water-based) (NN circulatory) (NN system))) (. .)))