CREATE TABLE table_40225 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

What is Tournament, when Margin is Victory of 6 Strokes?
SELECT "Tournament" FROM table_40225 WHERE "Margin of victory" = '6 strokes'
SELECT "Tournament" FROM "table_40225" WHERE "Margin of victory" = '6 strokes'