Question: What is the date that a Hell ship sunk in the East China Sea?
SQL: SELECT "Date" FROM "2-13046272-3" WHERE "Where sunk" = 'East China Sea' AND "Ship type" = 'Hell ship';

Question: Which nation had a Battlecruiser with an estimate of 513?
SQL: SELECT "Nat." FROM "2-13046272-3" WHERE "Ship type" = 'Battlecruiser' AND "Estimate" = '513';

Question: What is the date that a ship sank in the South Atlantic?
SQL: SELECT "Date" FROM "2-13046272-3" WHERE "Where sunk" = 'South Atlantic';

Question: What type of ship was the Shinano?
SQL: SELECT "Ship type" FROM "2-13046272-3" WHERE "Name" = 'Shinano';

Question: What nation had a ship named Roma?
SQL: SELECT "Nat." FROM "2-13046272-3" WHERE "Name" = 'Roma';