CREATE TABLE GRAPES (Grape VARCHAR2, Color VARCHAR2)
CREATE TABLE WINE (Grape VARCHAR2, score VARCHAR2)

Find the the grape whose white color grapes are used to produce wines with scores higher than 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" "T1" JOIN "WINE" "T2" ON "T1"."Grape" = "T2"."Grape" AND "T2"."score" > 90 WHERE "T1"."Color" = "White"