CREATE TABLE table_56815 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Save" CLOB)

Who is the opponent on May 7?
SELECT "Opponent" FROM table_56815 WHERE "Date" = 'may 7'
SELECT "Opponent" FROM "table_56815" WHERE "Date" = 'may 7'