( Peptic ( ( ( ulcer ( An ( eroded area ) ) ) ( ( ( in ( the ( stomach lining ) ) ) or ) ( in ( ( ( the ( first part ) ) ( of ( the duodenum ) ) ) ( -LRB- ( ( beginning ( of ( the ( small intestine ) ) ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Peptic)) (VP (VBZ ulcer) (NP (DT An) (JJ eroded) (NN area)) (PP (PP (IN in) (NP (DT the) (NN stomach) (NN lining))) (CC or) (PP (IN in) (NP (NP (DT the) (JJ first) (NN part)) (PP (IN of) (NP (DT the) (NN duodenum))) (PRN (-LRB- -LRB-) (PP (VBG beginning) (PP (IN of) (NP (DT the) (JJ small) (NN intestine)))) (-RRB- -RRB-)))))) (. .)))
Peptic ulcer An eroded area in the stomach lining or in the first part of the duodenum (beginning of the small intestine).
(ROOT (S (NP (DT The) (JJ small) (NN intestine)) (VP (VBZ begins) (PP (IN in) (NP (DT the) (NN stomach)))) (. .)))