CREATE TABLE table_11478 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "To par" CLOB, "Margin of victory" CLOB)

What is the date of the tournament with 5 strokes as the margin of victory?
SELECT "Date" FROM table_11478 WHERE "Margin of victory" = '5 strokes'
SELECT "Date" FROM "table_11478" WHERE "Margin of victory" = '5 strokes'