Bilateral carotid stenosis 80 to 90% right greater then left.
 The patient has normal carotid arteries.
(ROOT (NP (NP (NP (JJ Bilateral) (NN carotid) (NN stenosis) (CD 80)) (PP (TO to) (NP (CD 90) (NN %))) (NP (ADJP (RB right) (JJR greater)) (S (ADVP (RB then)) (VP (VBD left))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (JJ normal) (NN carotid) (NNS arteries))) (. .)))
( ( ( ( Bilateral ( carotid ( stenosis 80 ) ) ) ( to ( 90 % ) ) ) ( ( right greater ) ( then left ) ) ) . )
( ( The patient ) ( ( has ( normal ( carotid arteries ) ) ) . ) )