( ( ( ( numbers and ) types ) ( of ( ( organs and ) tissues ) ) ) ( retained ; ) )
(ROOT (S (NP (NP (NNS numbers) (CC and) (NNS types)) (PP (IN of) (NP (NNS organs) (CC and) (NNS tissues)))) (VP (VBD retained)) (: ;)))
numbers and types of organs and tissues retained;
(ROOT (S (NP (NNS Roundworms)) (VP (VBP exemplify) (NP (NP (JJ organ-level) (NN organization)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NP (QP (CD two) (CC or) (JJR more)) (NNS types)) (PP (IN of) (NP (NNS tissues)))) (VP (VBP work) (ADVP (RB together)) (S (VP (TO to) (VP (VB perform) (NP (DT a) (JJ particular) (NN function)) (PP (IN as) (NP (DT an) (NN organ))))))))))) (. .)))