How many turbine manufacturers installed a capacity of 189 MW?
CREATE TABLE table_24837750_1 (
    turbine_manufacturer VARCHAR,
    installed_capacity__mw_ VARCHAR
)
SELECT COUNT(turbine_manufacturer) FROM table_24837750_1 WHERE installed_capacity__mw_ = "189"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many turbine manufacturers installed a capacity of 189 MW? ### Input: CREATE TABLE table_24837750_1 (
    turbine_manufacturer VARCHAR,
    installed_capacity__mw_ VARCHAR
) ### Response: SELECT COUNT(turbine_manufacturer) FROM table_24837750_1 WHERE installed_capacity__mw_ = "189"