CREATE TABLE "three_abreast_cabin" (
  "model" text,
  "seats" text,
  "period" text,
  "built" text,
  "country" text
);

Question: In what time period were 578 built?
SQL: SELECT "period" FROM "three_abreast_cabin" WHERE "built"='578';

Question: In what time period was the Cessna 208 built?
SQL: SELECT "period" FROM "three_abreast_cabin" WHERE "model"='cessna 208';

Question: In what time period were 354 built?
SQL: SELECT "period" FROM "three_abreast_cabin" WHERE "built"='354';