CREATE TABLE table_32470 ("Year" FLOAT, "Championship" TEXT, "Winning score" TEXT, "Margin" TEXT, "Runner ( s ) -up" TEXT)

Which championship had a margin of 10 strokes?
SELECT "Championship" FROM table_32470 WHERE "Margin" = '10 strokes'
SELECT "Championship" FROM "table_32470" WHERE "Margin" = '10 strokes'