She has a history of a positive PPD with a negative chest x- ray.
 The patient is immunocompetent.
(ROOT (S (NP (PRP She)) (VP (VBZ has) (NP (NP (DT a) (NN history)) (PP (IN of) (NP (DT a) (JJ positive) (NN PPD)))) (PP (IN with) (NP (NP (DT a) (JJ negative) (NN chest) (NN x)) (: -) (NP (NN ray))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ is) (ADJP (JJ immunocompetent))) (. .)))
( She ( ( ( has ( ( a history ) ( of ( a ( positive PPD ) ) ) ) ) ( with ( ( ( a ( negative ( chest x ) ) ) - ) ray ) ) ) . ) )
( ( The patient ) ( ( is immunocompetent ) . ) )