What is the highest capacity of the tsentral stadium (batumi)?
CREATE TABLE "pirveli_liga_2011_12" (
  "clubs" text,
  "position_2010_11" text,
  "region" text,
  "stadium" text,
  "capacity" real
);
SELECT MAX("capacity") FROM "pirveli_liga_2011_12" WHERE "stadium"='tsentral stadium (batumi)';