CREATE TABLE GRAPES (GRAPE VARCHAR, Color VARCHAR)
CREATE TABLE WINE (Winery VARCHAR, GRAPE VARCHAR)

Find the top 3 wineries with the greatest number of wines made of white color grapes.
SELECT T2.Winery FROM GRAPES AS T1 JOIN WINE AS T2 ON T1.GRAPE = T2.GRAPE WHERE T1.Color = "White" GROUP BY T2.Winery ORDER BY COUNT(*) DESC LIMIT 3
SELECT "T2"."Winery" FROM "GRAPES" AS "T1" JOIN "WINE" AS "T2" ON "T1"."GRAPE" = "T2"."GRAPE" WHERE "T1"."Color" = "White" GROUP BY "T2"."Winery" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 3