Name the most revenue for operating income more than 27 for hamburg and debt as % of value less than 0
CREATE TABLE "2009_rankings" (
  "rank" real,
  "team" text,
  "country" text,
  "value_m" real,
  "debt_as_pct_of_value" real,
  "pct_change_on_year" text,
  "revenue_m" real,
  "operating_income_m" real
);
SELECT MAX("revenue_m") FROM "2009_rankings" WHERE "operating_income_m">27 AND "team"='hamburg' AND "debt_as_pct_of_value"<0;