He took an OTC indigestion remedy, and his pain eventually resolved after a couple of hours.
 The patient has a history of GERD
(ROOT (S (NP (PRP He)) (VP (VP (VBD took) (NP (DT an) (NNP OTC) (NN indigestion) (NN remedy))) (, ,) (CC and) (NP (NP (PRP$ his) (NN pain)) (VP (ADVP (RB eventually)) (VBN resolved) (PP (IN after) (NP (NP (DT a) (NN couple)) (PP (IN of) (NP (NNS hours)))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (NP (DT a) (NN history)) (PP (IN of) (NP (NNP GERD)))))))
( He ( ( ( ( ( took ( an ( OTC ( indigestion remedy ) ) ) ) , ) and ) ( ( his pain ) ( eventually ( resolved ( after ( ( a couple ) ( of hours ) ) ) ) ) ) ) . ) )
( ( The patient ) ( has ( ( a history ) ( of GERD ) ) ) )