user: Question: What is the total number of sunk by U-boats with less than 2 German submarines lost, 56328 sunk by aircrafts, and more than 8269 sunk by mines?
Columns: ['Month, year', 'Sunk by U-Boat', 'Sunk by aircraft', 'Sunk by warship or raider', 'Sunk by mines', 'German submarines lost']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ["39-09 Sep. '39", 153879.0, 0.0, 5051.0, 29537.0, 2.0]
SQL:

assistant: SELECT SUM("Sunk by U-Boat") FROM "Table" WHERE "German submarines lost" < 2.0 AND "Sunk by aircraft" = 56328.0 AND "Sunk by mines" > 8269.0;