CREATE TABLE table_56809 ("Race Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Constructor" CLOB, "Report" CLOB)

Tell me the race name where stirling moss won on 16 april
SELECT "Race Name" FROM table_56809 WHERE "Winning driver" = 'stirling moss' AND "Date" = '16 april'
SELECT "Race Name" FROM "table_56809" WHERE "Date" = '16 april' AND "Winning driver" = 'stirling moss'