Which of V/Line Passenger's pre-conversions re-entered service on 23 November 1984?
CREATE TABLE "locomotives" (
  "locomotive" text,
  "pre_conversion" text,
  "entered_service_t" text,
  "re_entered_service_p" text,
  "owner" text
);
SELECT "pre_conversion" FROM "locomotives" WHERE "owner"='v/line passenger' AND "re_entered_service_p"='23 november 1984';