On what date did Hudswell Clarke build the locomotive with 0-6-0 ST wheel arrangements?
CREATE TABLE "steam_locomotives" (
  "name" text,
  "number" text,
  "builder" text,
  "date_built" text,
  "wheel_arrangement" text,
  "driving_wheels" text,
  "cylinders" text,
  "boiler_pressure" text,
  "notes" text
);
SELECT "date_built" FROM "steam_locomotives" WHERE "wheel_arrangement"='0-6-0 ST' AND "builder"='Hudswell Clarke';