CREATE TABLE table_9840 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Decision" TEXT, "Attendance" FLOAT, "Record" TEXT)

Who was the visitor on April 2?
SELECT "Visitor" FROM table_9840 WHERE "Date" = 'april 2'
SELECT "Visitor" FROM "table_9840" WHERE "Date" = 'april 2'