Tell me the highest launced for trn
CREATE TABLE "oil_refining_and_petrochemical_facilitie" (
  "name" text,
  "location" text,
  "launched" real,
  "acquired" text,
  "capacity_mln_tpa" text
);
SELECT MAX("launched") FROM "oil_refining_and_petrochemical_facilitie" WHERE "name"='trn';