( They ( ( have ( a ( ( very sophisticated ) ( circulatory system ) ) ) ) ; ) )
(ROOT (S (NP (PRP They)) (VP (VBP have) (NP (DT a) (ADJP (RB very) (JJ sophisticated)) (NN circulatory) (NN system))) (: ;)))
They have a very sophisticated circulatory system;
(ROOT (S (NP (DT A) (NN jellyfish)) (VP (VBZ does) (RB not) (VP (VB have) (NP (DT a) (JJ circulatory) (NN system)))) (. .)))