Migraines with visual aura.
 the patient is on sumatriptan
(ROOT (NP (NP (NP (NNS Migraines)) (PP (IN with) (NP (JJ visual) (NN aura)))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ is) (PP (IN on) (NP (NN sumatriptan))))))
( ( Migraines ( with ( visual aura ) ) ) . )
( ( the patient ) ( is ( on sumatriptan ) ) )