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_23958917_1 (stacks VARCHAR, unit_capacity__2009_ VARCHAR)
### Question:
Name the number of stacks for 1 & 2 235 mw 3 & 4 88.2 mw
### Answer:
SELECT COUNT(stacks) FROM table_23958917_1 WHERE unit_capacity__2009_ = "1 & 2 235 MW 3 & 4 88.2 MW"