( ( ( mammals ( birds ( amphibians ( bony fish ) ) ) ) ( As adults ) ) ( , ( ( these chordates ) ( ( are ( lacking ( ( ( a tail ) and ) ( a notochord ) ) ) ) . ) ) ) )
(ROOT (S (PP (NP (NNP mammals) (NNP birds) (NNP amphibians) (JJ bony) (NN fish)) (IN As) (NP (NNS adults))) (, ,) (NP (DT these) (NNS chordates)) (VP (VBP are) (VP (VBG lacking) (NP (NP (DT a) (NN tail)) (CC and) (NP (DT a) (NN notochord))))) (. .)))
mammals birds amphibians bony fish As adults, these chordates are lacking a tail and a notochord.
(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))))))) (. .)))