What was the average speed of Tony Stewart's winning Chevrolet Impala?
CREATE TABLE table_name_47 (
    avg_speed VARCHAR,
    winning_driver VARCHAR,
    make VARCHAR
)
SELECT avg_speed FROM table_name_47 WHERE winning_driver = "tony stewart" AND make = "chevrolet impala"
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 was the average speed of Tony Stewart's winning Chevrolet Impala? ### Input: CREATE TABLE table_name_47 (
    avg_speed VARCHAR,
    winning_driver VARCHAR,
    make VARCHAR
) ### Response: SELECT avg_speed FROM table_name_47 WHERE winning_driver = "tony stewart" AND make = "chevrolet impala"