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_17 (capacity__mw_ VARCHAR, notes VARCHAR)
### Question:
What is the total capacity (MW) of the farm that is noted as being under construction?
### Answer:
SELECT COUNT(capacity__mw_) FROM table_name_17 WHERE notes = "under construction"