( ( ( The section ) ( of ( ( the brain ) ( that ( controls ( the pituitary ) ) ) ) ) ) ( ( is ( the hypothalamus ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN section)) (PP (IN of) (NP (NP (DT the) (NN brain)) (SBAR (WHNP (WDT that)) (S (VP (VBZ controls) (NP (DT the) (NN pituitary)))))))) (VP (VBZ is) (NP (DT the) (NNS hypothalamus))) (. .)))
The section of the brain that controls the pituitary is the hypothalamus.
(ROOT (NP (NP (DT The) (NNS hypothalamus)) (: --) (S (NP (JJ pituitary) (NN complex)) (VP (VBZ is) (VP (VBN located) (PP (IN in) (NP (NP (DT the) (NN body)) (PP (IN in) (NP (NP (DT the) (NN diencephalon)) (PP (IN of) (NP (DT the) (NN brain)))))))))) (. .)))