What is the highest tonnage of the Brig Ship Type and the disposition of Ship of Prize?
CREATE TABLE "first_raiding_cruise" (
  "date" text,
  "ship_name" text,
  "tonnage" real,
  "ship_type" text,
  "location" text,
  "disposition_of_ship" text
);
SELECT MAX("tonnage") FROM "first_raiding_cruise" WHERE "ship_type"='brig' AND "disposition_of_ship"='prize';