PAST MEDICAL HISTORY:  Acute renal failure during last medical admission which is now resolved.
 the patient has a history of acute renal failure
(ROOT (NP (NP (JJ PAST) (JJ MEDICAL) (NN HISTORY)) (: :) (NP (NP (JJ Acute) (JJ renal) (NN failure)) (PP (IN during) (NP (NP (JJ last) (JJ medical) (NN admission)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB now)) (VP (VBN resolved)))))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ has) (NP (NP (DT a) (NN history)) (PP (IN of) (NP (JJ acute) (JJ renal) (NN failure)))))))
( ( ( ( PAST ( MEDICAL HISTORY ) ) : ) ( ( Acute ( renal failure ) ) ( during ( ( last ( medical admission ) ) ( which ( ( is now ) resolved ) ) ) ) ) ) . )
( ( the patient ) ( has ( ( a history ) ( of ( acute ( renal failure ) ) ) ) ) )