CREATE TABLE table_56712 ("Date" CLOB, "Visitor" CLOB, "Score" CLOB, "Home" CLOB, "Leading scorer" CLOB, "Attendance" FLOAT, "Record" CLOB)

Who was the visiting team on December 17?
SELECT "Visitor" FROM table_56712 WHERE "Date" = 'december 17'
SELECT "Visitor" FROM "table_56712" WHERE "Date" = 'december 17'