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_12 (date_outgoing VARCHAR, outgoing_manager VARCHAR)
### Question:
When did Peter Butler leave his team?
### Answer:
SELECT date_outgoing FROM table_name_12 WHERE outgoing_manager = "peter butler"