( Tunicates ( ( ( are similar ) ( ( ( to ( chordates ( in ( their ( embryonic development ) ) ) ) ) ( but not ) ) ( as ( adults 3 ) ) ) ) . ) )
(ROOT (S (NP (NNS Tunicates)) (VP (VBP are) (ADJP (JJ similar)) (PP (PP (TO to) (NP (NP (NNS chordates)) (PP (IN in) (NP (PRP$ their) (JJ embryonic) (NN development))))) (CONJP (CC but) (RB not)) (PP (IN as) (NP (NNP adults) (CD 3))))) (. .)))
Tunicates are similar to chordates in their embryonic development but not as adults 3.
(ROOT (S (NP (JJ Adult) (NNS humans)) (VP (VBP lack) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (VBG defining) (NNS traits)) (PP (IN of) (NP (NNS chordates))))))) (. .)))