Chest x-ray showed mild congestive heart failure.
 Chest x-ray showed mild abnormalities
(ROOT (S (NP (NN Chest) (NN x-ray)) (VP (VBD showed) (NP (JJ mild) (JJ congestive) (NN heart) (NN failure))) (. .)))
(ROOT (S (NP (NN Chest) (NN x-ray)) (VP (VBD showed) (NP (JJ mild) (NNS abnormalities)))))
( ( Chest x-ray ) ( ( showed ( mild ( congestive ( heart failure ) ) ) ) . ) )
( ( Chest x-ray ) ( showed ( mild abnormalities ) ) )