What fleet  numbers have a diagram less than 99 and built in 1960?
CREATE TABLE "list_of_preserved_rm_bs" (
  "lot_no" real,
  "diagram" real,
  "built" text,
  "builder" text,
  "fleet_numbers" text
);
SELECT "fleet_numbers" FROM "list_of_preserved_rm_bs" WHERE "diagram"<99 AND "built"='1960';