CREATE TABLE "ch_or_12th_emergency_flotilla" (
  "name" text,
  "pennant" text,
  "builder" text,
  "laid_down" text,
  "launched" text,
  "commissioned" text
);

Question: What is the building for the r90 pennant?
SQL: SELECT "builder" FROM "ch_or_12th_emergency_flotilla" WHERE "pennant"='r90';

Question: What is the pennant with Denny, Dumbarton as the builder?
SQL: SELECT "pennant" FROM "ch_or_12th_emergency_flotilla" WHERE "builder"='denny, dumbarton';

Question: What is the laid down date of the destroyer with a r29 pennant?
SQL: SELECT "laid_down" FROM "ch_or_12th_emergency_flotilla" WHERE "pennant"='r29';