CREATE TABLE "class" (
  "name" text,
  "pennant" text,
  "builder" text,
  "laid_down" text,
  "launched" text,
  "commissioned" text
);

Question: What pennant does Narbada have?
SQL: SELECT "pennant" FROM "class" WHERE "name"='narbada';

Question: What date was the U21 pennant laid down?
SQL: SELECT "laid_down" FROM "class" WHERE "pennant"='u21';