CREATE TABLE table_50895 ("Race Title" CLOB, "Circuit" CLOB, "City / State" CLOB, "Date" CLOB, "Winner" CLOB, "Team" CLOB)

On what date was the race in Melbourne, Victoria?
SELECT "Date" FROM table_50895 WHERE "City / State" = 'melbourne, victoria'
SELECT "Date" FROM "table_50895" WHERE "City / State" = 'melbourne, victoria'