c/o SOB, CXR showed widened mediastinum.
 Patient has normal imaging
(ROOT (NP (NP (NP (NN c/o) (NN SOB)) (, ,) (NP (NN CXR)) (VP (VBD showed) (NP (VBN widened) (NN mediastinum)))) (. .)))
(ROOT (S (NP (NN Patient)) (VP (VBZ has) (NP (JJ normal) (NN imaging)))))
( ( ( ( ( c/o SOB ) , ) CXR ) ( showed ( widened mediastinum ) ) ) . )
( Patient ( has ( normal imaging ) ) )