How many letters were given to the organization with a founding date of 1997-12-12? 
CREATE TABLE "south_asian" (
  "letters" text,
  "organization" text,
  "nickname" text,
  "founding_date" text,
  "founding_university" text,
  "type" text
);
SELECT COUNT("letters") FROM "south_asian" WHERE "founding_date"='1997-12-12';