Tell me the listed when cerclis id is msd004006995
CREATE TABLE "superfund_sites" (
  "cerclis_id" text,
  "name" text,
  "county" text,
  "proposed" text,
  "listed" text,
  "construction_completed" text,
  "partially_deleted" text,
  "deleted" text
);
SELECT "listed" FROM "superfund_sites" WHERE "cerclis_id"='msd004006995';