( ( The metacercaria ) ( ( is ( ( ( released ( in ( ( ( the intestine ) and ) migrates ) ) ) ( to ( the lungs ) ) ) ( to ( mature ( into ( an adult ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN metacercaria)) (VP (VBZ is) (VP (VBN released) (PP (IN in) (NP (NP (DT the) (NN intestine)) (CC and) (NP (NNS migrates)))) (PP (TO to) (NP (DT the) (NNS lungs))) (S (VP (TO to) (VP (VB mature) (PP (IN into) (NP (DT an) (NN adult)))))))) (. .)))
The metacercaria is released in the intestine and migrates to the lungs to mature into an adult.
(ROOT (S (PP (IN In) (NP (NNS intestines))) (NP (JJ human) (NN organ)) (VP (VBP do) (S (NP (DT the) (NNS juveniles)) (VP (VB develop) (PP (IN into) (NP (RB sexually) (JJ mature) (NNS adults)))))) (. .)))