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_28672269_1 (date_of_commissioning VARCHAR, unit_number VARCHAR)
### Question:
What are Unit 2's dates of commissioning?
### Answer:
SELECT COUNT(date_of_commissioning) FROM table_28672269_1 WHERE unit_number = 2