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

### Instruction:
What's the total L/100km extra urban fueled by diesel, when the mpg-UK combines is more than 19.2, mpg-US is less than 50 and the L/100m combined is less than 5.7?

### 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 L/100km Extra-Urban FROM table WHERE mpg-UK Combined > 19.2 AND L/100km Combined < 5.7 AND Fuel Type = diesel AND mpg-US Combined < 50