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_19359427_6 (date_of_appointment VARCHAR, position_in_table VARCHAR)
### Question:
When was the new manager of the team on 21st position appointed?
### Answer:
SELECT date_of_appointment FROM table_19359427_6 WHERE position_in_table = "21st"