What is the date that a hell ship sunk in the East China Sea?
CREATE TABLE table_68769 (
    "Estimate" text,
    "Name" text,
    "Nat." text,
    "Ship type" text,
    "Where sunk" text,
    "Date" text
)
SELECT "Date" FROM table_68769 WHERE "Where sunk" = 'east china sea' AND "Ship type" = 'hell ship'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the date that a hell ship sunk in the East China Sea? ### Input: CREATE TABLE table_68769 (
    "Estimate" text,
    "Name" text,
    "Nat." text,
    "Ship type" text,
    "Where sunk" text,
    "Date" text
) ### Response: SELECT "Date" FROM table_68769 WHERE "Where sunk" = 'east china sea' AND "Ship type" = 'hell ship'