CREATE TABLE table_53231 ("Date" CLOB, "Visitor" CLOB, "Score" CLOB, "Home" CLOB, "Record" CLOB)

What city was a visitor on the date of April 30?
SELECT "Visitor" FROM table_53231 WHERE "Date" = 'april 30'
SELECT "Visitor" FROM "table_53231" WHERE "Date" = 'april 30'