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_56 (gross_mw VARCHAR, operation_start VARCHAR)
### Question:
Operation start of 2015 has what gross mw?
### Answer:
SELECT gross_mw FROM table_name_56 WHERE operation_start = "2015"