( ( ( The babies ) ( of marsupials ) ) ( ( are ( ( ( born ( at ( an ( ( extremely immature ) stage ) ) ) ) and ) ( ( migrate ( to ( the pouch ) ) ) ( where ( they ( attach ( to ( a ( teat ( to ( complete ( their development ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS babies)) (PP (IN of) (NP (NNS marsupials)))) (VP (VBP are) (VP (VP (VBN born) (PP (IN at) (NP (DT an) (ADJP (RB extremely) (JJ immature)) (NN stage)))) (CC and) (VP (VB migrate) (PP (TO to) (NP (DT the) (NN pouch))) (SBAR (WHADVP (WRB where)) (S (NP (PRP they)) (VP (VBP attach) (PP (TO to) (NP (DT a) (NN teat) (S (VP (TO to) (VP (VB complete) (NP (PRP$ their) (NN development))))))))))))) (. .)))
The babies of marsupials are born at an extremely immature stage and migrate to the pouch where they attach to a teat to complete their development.
(ROOT (S (NP (PRP You)) (VP (VBP call) (SBAR (WHNP (DT an) (NN animal) (WHPP (IN in) (WHNP (WDT which)))) (S (NP (NP (DT the) (NN embryo)) (, ,) (VP (ADVP (RB often)) (VBN termed) (NP (DT a) (NN joey))) (, ,)) (VP (VP (VBZ is) (VP (VBN born) (S (ADJP (JJ immature))))) (CC and) (VP (MD must) (VP (VB complete) (NP (PRP$ its) (NN development)) (PP (IN outside) (NP (NP (DT the) (NN mother) (POS 's)) (NN body))))) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN marsupial)))))) (. .)))