What T20 match was played in 1979?
CREATE TABLE "ground_history" (
  "name_of_ground" text,
  "location" text,
  "year" text,
  "fc_matches" text,
  "la_matches" text,
  "t20_matches" text,
  "total" text
);
SELECT "t20_matches" FROM "ground_history" WHERE "year"='1979';