Tell me the constructor for alberto colombo and chassis of a1
CREATE TABLE table_54390 (
    "Entrant" text,
    "Constructor" text,
    "Chassis" text,
    "Engine" text,
    "Tyres" text,
    "Driver" text,
    "Rounds" text
)
SELECT "Constructor" FROM table_54390 WHERE "Driver" = 'alberto colombo' AND "Chassis" = 'a1'
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: Tell me the constructor for alberto colombo and chassis of a1 ### Input: CREATE TABLE table_54390 (
    "Entrant" text,
    "Constructor" text,
    "Chassis" text,
    "Engine" text,
    "Tyres" text,
    "Driver" text,
    "Rounds" text
) ### Response: SELECT "Constructor" FROM table_54390 WHERE "Driver" = 'alberto colombo' AND "Chassis" = 'a1'