How many productions are shown for rd 2?
CREATE TABLE "table1_26686908_2" (
  "rd" text,
  "circuit" text,
  "city_state" text,
  "date" text,
  "championship" text,
  "challenge" text,
  "production" text
);
SELECT COUNT("production") FROM "table1_26686908_2" WHERE "rd"='Rd 2';