( ( Underneath ( the brain ) ) ( , ( there ( ( is ( ( ( a ( small ( , ( well-protected gland ) ) ) ) , ) ( the ( pituitary gland ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (VB Underneath) (NP (DT the) (NN brain)))) (, ,) (NP (EX there)) (VP (VBZ is) (NP (NP (DT a) (JJ small) (, ,) (JJ well-protected) (NN gland)) (, ,) (NP (DT the) (JJ pituitary) (NN gland)))) (. .)))
Underneath the brain, there is a small, well-protected gland, the pituitary gland.
(ROOT (S (NP (DT The) (JJ pituitary) (NN gland)) (VP (VBZ is) (PP (IN in) (NP (DT the) (NN brain)))) (. .)))