History of pulmonary embolism.
 patient has had a PE
(ROOT (NP (NP (NP (NN History)) (PP (IN of) (NP (JJ pulmonary) (NN embolism)))) (. .)))
(ROOT (S (NP (NN patient)) (VP (VBZ has) (VP (VBN had) (NP (DT a) (NN PE))))))
( ( History ( of ( pulmonary embolism ) ) ) . )
( patient ( has ( had ( a PE ) ) ) )