( Ulcers ( ( can ( ( occur ( both ( ( ( in ( ( the stomach ) ( -LRB- ( ( gastric ulcers ) -RRB- ) ) ) ) or ) ( in ( the ( upper section ) ) ) ) ) ) ( of ( ( the ( small intestine ) ) ( known ( as ( ( the duodenum ) ( -LRB- ( ( duodenal ulcers ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Ulcers)) (VP (MD can) (VP (VB occur) (PP (DT both) (PP (IN in) (NP (NP (DT the) (NN stomach)) (PRN (-LRB- -LRB-) (NP (JJ gastric) (NNS ulcers)) (-RRB- -RRB-)))) (CC or) (PP (IN in) (NP (DT the) (JJ upper) (NN section)))) (PP (IN of) (NP (NP (DT the) (JJ small) (NN intestine)) (VP (VBN known) (PP (IN as) (NP (NP (DT the) (NN duodenum)) (PRN (-LRB- -LRB-) (NP (JJ duodenal) (NNS ulcers)) (-RRB- -RRB-))))))))) (. .)))
Ulcers can occur both in the stomach (gastric ulcers) or in the upper section of the small intestine known as the duodenum (duodenal ulcers).
(ROOT (S (NP (JJ Gastric) (NN emptying)) (VP (VBZ is) (VP (VBN regulated) (PP (IN by) (NP (NP (PDT both) (DT the) (NN stomach)) (CC and) (NP (DT the) (NN duodenum)))))) (. .)))