CREATE TABLE table_55508 ("Stations" TEXT, "Place" TEXT, "Managed By" TEXT, "Platforms" FLOAT, "Zone" FLOAT)

Which Zone is the lowest when Managed By Southern and has Platforms under 2?
SELECT MIN("Zone") FROM table_55508 WHERE "Managed By" = 'southern' AND "Platforms" < '2'
SELECT MIN("Zone") FROM "table_55508" WHERE "Managed By" = 'southern' AND "Platforms" < '2'