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_51 (replaced_by VARCHAR, date_of_vacancy VARCHAR)
### Question:
who is the replacement when the date of vacancy is 1 september 2008?
### Answer:
SELECT replaced_by FROM table_name_51 WHERE date_of_vacancy = "1 september 2008"