CREATE TABLE "allied_ships" (
  "date" text,
  "name" text,
  "flag" text,
  "tonnage_grt" real,
  "sunk_by" text
);

Question: What is the flag for Terkoeli?
SQL: SELECT "flag" FROM "allied_ships" WHERE "name"='terkoeli';

Question: What is the date for the flag of Norway?
SQL: SELECT "date" FROM "allied_ships" WHERE "flag"='norway';

Question: Who sunk the ship with the flag of Norway?
SQL: SELECT "sunk_by" FROM "allied_ships" WHERE "flag"='norway';