He underwent stress testing which was abnormal.
 The patient has a normal stress test.
(ROOT (S (NP (PRP He)) (VP (VBD underwent) (NP (NP (NN stress) (NN testing)) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (ADJP (JJ abnormal))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (DT a) (JJ normal) (NN stress) (NN test))) (. .)))
( He ( ( underwent ( ( stress testing ) ( which ( was abnormal ) ) ) ) . ) )
( ( The patient ) ( ( has ( a ( normal ( stress test ) ) ) ) . ) )