Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_71 (date VARCHAR, where_sunk VARCHAR, ship_type VARCHAR)
### Question:
What is the date that a hell ship sunk in the East China Sea?
### Answer:
SELECT date FROM table_name_71 WHERE where_sunk = "east china sea" AND ship_type = "hell ship"