Find the white grape used to produce wines with scores above 90.
SELECT DISTINCT T1.Grape FROM GRAPES AS T1 JOIN WINE AS T2 ON T1.Grape  =  T2.Grape WHERE T1.Color  =  "White" AND T2.score  >  90
SELECT DISTINCT T1.Grape FROM GRAPES AS T1 JOIN WINE AS T2 ON T1.Grape  =  T2.Grape WHERE T1.Color  =  "White" AND T2.score  >  90
[{'Grape': 'Sauvignon Blanc'}, {'Grape': 'Chardonnay'}, {'Grape': 'Roussanne'}]