CREATE TABLE table_78404 ("Date" CLOB, "Venue" CLOB, "Score" CLOB, "Result" CLOB, "Competition" CLOB)

What was the name of the competition that took place on may 31, 2008?
SELECT "Competition" FROM table_78404 WHERE "Date" = 'may 31, 2008'
SELECT "Competition" FROM "table_78404" WHERE "Date" = 'may 31, 2008'