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_27683516_3 (team VARCHAR, date_of_vacancy VARCHAR)
### Question:
How many dates of vacancy were on 30 october 2010?
### Answer:
SELECT COUNT(team) FROM table_27683516_3 WHERE date_of_vacancy = "30 October 2010"