CREATE TABLE table_24525 ("No." FLOAT, "Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

Who was the runner up when the won by 4 strokes?
SELECT "Runner(s)-up" FROM table_24525 WHERE "Margin of victory" = '4 strokes'
SELECT "Runner(s)-up" FROM "table_24525" WHERE "Margin of victory" = '4 strokes'