CREATE TABLE table_15459 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What was the margin of victory for the win with a score of 71-69-71-70=281?
SELECT "Margin of victory" FROM table_15459 WHERE "Winning score" = '71-69-71-70=281'
SELECT "Margin of victory" FROM "table_15459" WHERE "Winning score" = '71-69-71-70=281'