CREATE TABLE "operational" (
  "number_name" text,
  "description" text,
  "livery" text,
  "owner_s" text,
  "date" real
);

Question: Which Owner(s) has a Description of hunslet engine company 0-6-0st?
SQL: SELECT "owner_s" FROM "operational" WHERE "description"='hunslet engine company 0-6-0st';