Patient was sent back to the Emergency Department today because of difficulty breathing.
 The patient has a pulmonary problem. 
(ROOT (S (NP (NN Patient)) (VP (VBD was) (VP (VBN sent) (ADVP (RB back) (PP (TO to) (NP (DT the) (NNP Emergency) (NNP Department)))) (NP (NN today)) (PP (IN because) (IN of) (NP (NN difficulty) (NN breathing))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (DT a) (JJ pulmonary) (NN problem))) (. .)))
( Patient ( ( was ( ( ( sent ( back ( to ( the ( Emergency Department ) ) ) ) ) today ) ( because ( of ( difficulty breathing ) ) ) ) ) . ) )
( ( The patient ) ( ( has ( a ( pulmonary problem ) ) ) . ) )