( ( simple ( , ( compound ( and ( complex sentences ) ) ) ) ) ; )
(ROOT (NP (NP (NN simple) (, ,) (NN compound) (CC and) (NN complex) (NNS sentences)) (: ;)))
simple, compound and complex sentences;
(ROOT (S (NP (NNS Scissors)) (VP (VBP are) (NP (JJ compound) (NNS machines))) (. .)))