What is the biggest roll number of Sylvia Park School, which has a state authority?
CREATE TABLE "maungakiekie_tamaki_local_board" (
  "name" text,
  "years" text,
  "area" text,
  "authority" text,
  "decile" text,
  "roll" real
);
SELECT MAX("roll") FROM "maungakiekie_tamaki_local_board" WHERE "authority"='state' AND "name"='sylvia park school';