Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What's the CO2 g/km of a Fiat running on diesel with the L/100km urban more than 6.3 and an mpg-UK combined of 43.5?

### Inputs:
table_name: table, columns: ['Manufacturer', 'Transmission', 'Engine Capacity', 'Fuel Type', 'L/100km Urban (Cold)', 'L/100km Extra-Urban', 'L/100km Combined', 'mpg-UK Urban (Cold)', 'mpg-UK Extra-Urban', 'mpg-UK Combined', 'mpg-US Urban', 'mpg-US Extra-Urban', 'mpg-US Combined', 'CO 2 g/km', 'Green Rating']

### Response:
SELECT COUNT CO 2 g/km FROM table WHERE Fuel Type = diesel AND Manufacturer = fiat AND L/100km Urban (Cold) > 6.3 AND mpg-UK Combined = 43.5