CREATE TABLE "table1_23840623_4" (
  "vehicle" text,
  "operating_mode" text,
  "epa_rated_all_electric_range" text,
  "epa_rated_combined_fuel_economy" text,
  "clean_electric_grid_california_san_francisco" text,
  "u_s_national_average_electric_mix" text,
  "dirty_electric_grid_rocky_mountains_denver" text
);

Question: What is the epa rated combined fuel economy for the Nissan Leaf?
SQL: SELECT "epa_rated_combined_fuel_economy" FROM "table1_23840623_4" WHERE "vehicle"='Nissan Leaf';

Question: What is the operating mode of the Coda?
SQL: SELECT "operating_mode" FROM "table1_23840623_4" WHERE "vehicle"='Coda';

Question: What is the dirty electric grid rocky mountains (denver) for the vehicle with the clean electric grid california (san francisco) of 160 g/mi (99 g/km)?
SQL: SELECT "dirty_electric_grid_rocky_mountains_denver" FROM "table1_23840623_4" WHERE "clean_electric_grid_california_san_francisco"='160 g/mi (99 g/km)';

Question: How many dirty electric grid rocky mountains (denver) vehicles have an  epa rated combined fuel economy of 102 mpg-e (33kw-hrs/100mi)?
SQL: SELECT COUNT("dirty_electric_grid_rocky_mountains_denver") FROM "table1_23840623_4" WHERE "epa_rated_combined_fuel_economy"='102 mpg-e (33kW-hrs/100mi)';

Question: 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)?
SQL: SELECT "epa_rated_combined_fuel_economy" FROM "table1_23840623_4" WHERE "operating_mode"='All-electric' AND "dirty_electric_grid_rocky_mountains_denver"='330 g/mi (205 g/km)';

Question: How many clean electric grid california (san francisco) figures are given for the Nissan Leaf?
SQL: SELECT COUNT("clean_electric_grid_california_san_francisco") FROM "table1_23840623_4" WHERE "vehicle"='Nissan Leaf';