CREATE TABLE table_13566 ("Year" FLOAT, "Stage" FLOAT, "Start of stage" TEXT, "Distance  ( km ) " TEXT, "Category of climb" TEXT, "Stage winner" TEXT, "Yellow jersey" TEXT)

Who was the stage winner when the stage was more than 10 and yellow jersey was Joseph Planckaert?
SELECT "Stage winner" FROM table_13566 WHERE "Stage" > '10' AND "Yellow jersey" = 'joseph planckaert'
SELECT "Stage winner" FROM "table_13566" WHERE "Stage" > '10' AND "Yellow jersey" = 'joseph planckaert'