( Lancelets ( ( retain ( ( the ( three ( chordate characteristics ) ) ) ( as adults ) ) ) . ) )
(ROOT (S (NP (NNS Lancelets)) (VP (VBP retain) (NP (NP (DT the) (CD three) (JJ chordate) (NNS characteristics)) (PP (IN as) (NP (NNS adults))))) (. .)))
Lancelets retain the three chordate characteristics as adults.
(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))))))) (. .)))