( ( ( ( Babies ( can ( be ( ( ( born underwater ) , ) ( because ( they ( ( are still ) ( connected ( to ( the placenta ) ) ) ) ) ) ) ) ) ) and ) ( they ( ( have n't ) ( taken ( ( their ( first gasp ) ) ( of air ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Babies)) (VP (MD can) (VP (VB be) (VP (VBN born) (ADVP (RB underwater)) (, ,) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP are) (ADVP (RB still)) (VP (VBN connected) (PP (TO to) (NP (DT the) (NN placenta))))))))))) (CC and) (S (NP (PRP they)) (VP (VBP have) (RB n't) (VP (VBN taken) (NP (NP (PRP$ their) (JJ first) (NN gasp)) (PP (IN of) (NP (NN air))))))) (. .)))
Babies can be born underwater, because they are still connected to the placenta and they haven't taken their first gasp of air.
(ROOT (S (NP (NP (DT A) (NN connection)) (PP (TO to) (NP (DT the) (NN placenta)))) (VP (VBZ is) (VP (VBN required) (PP (IN for) (NP (DT a) (JJ newborn) (NN baby))) (S (VP (TO to) (VP (VB begin) (NP (NN breathing))))))) (. .)))