what's the cylinders/ valves with model being 1.8 20v
CREATE TABLE table_17181 (
    "model" text,
    "cylinders/ valves" text,
    "displacement cc" real,
    "max. power kW (PS) at rpm" text,
    "max. torque (Nm) at rpm" text,
    "engine code" text,
    "top speed (km/h)" real,
    "production period" text
)
SELECT "cylinders/ valves" FROM table_17181 WHERE "model" = '1.8 20V'
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's the cylinders/ valves with model being 1.8 20v ### Input: CREATE TABLE table_17181 (
    "model" text,
    "cylinders/ valves" text,
    "displacement cc" real,
    "max. power kW (PS) at rpm" text,
    "max. torque (Nm) at rpm" text,
    "engine code" text,
    "top speed (km/h)" real,
    "production period" text
) ### Response: SELECT "cylinders/ valves" FROM table_17181 WHERE "model" = '1.8 20V'