How many dirty electric grid rocky mountains (denver) vehicles have an epa rated combined fuel economy of 102 mpg-e (33kw-hrs/100mi)?
CREATE TABLE table_23840623_4 (
    dirty_electric_grid_rocky_mountains__denver_ VARCHAR,
    epa_rated_combined_fuel_economy VARCHAR
)
SELECT COUNT(dirty_electric_grid_rocky_mountains__denver_) FROM table_23840623_4 WHERE epa_rated_combined_fuel_economy = "102 mpg-e (33kW-hrs/100mi)"
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 dirty electric grid rocky mountains (denver) vehicles have an epa rated combined fuel economy of 102 mpg-e (33kw-hrs/100mi)? ### Input: CREATE TABLE table_23840623_4 (
    dirty_electric_grid_rocky_mountains__denver_ VARCHAR,
    epa_rated_combined_fuel_economy VARCHAR
) ### Response: SELECT COUNT(dirty_electric_grid_rocky_mountains__denver_) FROM table_23840623_4 WHERE epa_rated_combined_fuel_economy = "102 mpg-e (33kW-hrs/100mi)"