CREATE TABLE "ships_of_the_class" (
  "name" text,
  "pennant_number" text,
  "builder" text,
  "laid_down" text,
  "launched" text,
  "commissioned" text,
  "current_status" text
);

Question: Which launch date involved the Driade?
SQL: SELECT "launched" FROM "ships_of_the_class" WHERE "name"='Driade';