What is the epa rated combined fuel economy for the all-electric vehicle with dirty electric grid rocky mountains (denver) of 330 g/mi (205 g/km)?
CREATE TABLE table_23840623_4 (
    epa_rated_combined_fuel_economy VARCHAR,
    operating_mode VARCHAR,
    dirty_electric_grid_rocky_mountains__denver_ VARCHAR
)
SELECT epa_rated_combined_fuel_economy FROM table_23840623_4 WHERE operating_mode = "All-electric" AND dirty_electric_grid_rocky_mountains__denver_ = "330 g/mi (205 g/km)"
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: What is the epa rated combined fuel economy for the all-electric vehicle with dirty electric grid rocky mountains (denver) of 330 g/mi (205 g/km)? ### Input: CREATE TABLE table_23840623_4 (
    epa_rated_combined_fuel_economy VARCHAR,
    operating_mode VARCHAR,
    dirty_electric_grid_rocky_mountains__denver_ VARCHAR
) ### Response: SELECT epa_rated_combined_fuel_economy FROM table_23840623_4 WHERE operating_mode = "All-electric" AND dirty_electric_grid_rocky_mountains__denver_ = "330 g/mi (205 g/km)"