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

Question: what builder is now retired
SQL: SELECT "pennant_number" FROM "ships_of_the_class" WHERE "current_status"='retired';

Question: what builder launched the name minerva
SQL: SELECT "launched" FROM "ships_of_the_class" WHERE "name"='minerva';

Question: what is the name of the builder who launched in danaide
SQL: SELECT "launched" FROM "ships_of_the_class" WHERE "name"='danaide';