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

Question: What was the average tonnage for the Siljan ship from Sweden?
SQL: SELECT AVG("tonnage") FROM "summary_of_raiding_history" WHERE "nationality"='sweden' AND "name_of_ship"='siljan';

Question: What was the average tonnage for Beatus, raided on 18 October 1940?
SQL: SELECT AVG("tonnage") FROM "summary_of_raiding_history" WHERE "date"='18 october 1940' AND "name_of_ship"='beatus';

Question: Which ship had a tonnage over 8,782?
SQL: SELECT "name_of_ship" FROM "summary_of_raiding_history" WHERE "tonnage">'8,782';

Question: Which ship was raided on 26 September 1940?
SQL: SELECT "name_of_ship" FROM "summary_of_raiding_history" WHERE "date"='26 september 1940';