( Somatostatin ( ( blocks ( ( the ( gastrin secretion ) ) ( in ( the ( gastric antrum ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Somatostatin)) (VP (VBZ blocks) (NP (NP (DT the) (NN gastrin) (NN secretion)) (PP (IN in) (NP (DT the) (JJ gastric) (NN antrum))))) (. .)))
Somatostatin blocks the gastrin secretion in the gastric antrum.
(ROOT (S (NP (NNP Gastrin)) (VP (VBZ signals) (NP (NP (DT the) (NN secretion)) (PP (IN of) (NP (JJ gastric) (NN acid))))) (. .)))