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

### Instruction:
what's the cylinders/ valves with model being 1.8 20v

### Inputs:
table_name: table, columns: ['model', 'cylinders/ valves', 'displacement cc', 'max. power kW (PS) at rpm', 'max. torque (Nm) at rpm', 'engine code', 'top speed (km/h)', 'production period']

### Response:
SELECT cylinders/ valves FROM table WHERE model = 1.8 20V