CREATE TABLE table_15215 ("Date" CLOB, "Visitor" CLOB, "Score" CLOB, "Home" CLOB, "Record" CLOB)

Who is the visitor on May 9?
SELECT "Visitor" FROM table_15215 WHERE "Date" = 'may 9'
SELECT "Visitor" FROM "table_15215" WHERE "Date" = 'may 9'