Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_47 (avg_speed VARCHAR, winning_driver VARCHAR, make VARCHAR)
### Question:
What was the average speed of Tony Stewart's winning Chevrolet Impala?
### Answer:
SELECT avg_speed FROM table_name_47 WHERE winning_driver = "tony stewart" AND make = "chevrolet impala"