CREATE TABLE "summary_of_raiding_history" (
  "date" text,
  "ship" text,
  "nationality" text,
  "tonnage" real,
  "fate" text
);

Question: What was the tonnage of the Great Britain ship Batna?
SQL: SELECT "tonnage" FROM "summary_of_raiding_history" WHERE "nationality"='great britain' AND "ship"='batna';