user: Question: Which nation was the ship from that had 372 victims?
Columns: ['Estimate', 'Name', 'Nat.', 'Ship Type', 'Principal victims', 'Where sunk', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1300–1900', 'SS Sultana', 'US', 'Transport Steamboat', 'Union POWs formerly held by the Confederate Army', 'Mississippi River near Memphis', 'April 27, 1865']
SQL:

assistant: SELECT "Nat." FROM "Table" WHERE "Estimate" = '372';