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_6 (laps INTEGER, grid VARCHAR, driver VARCHAR)
### Question:
What is the average laps for the grid smaller than 21 for Renzo Zorzi?
### Answer:
SELECT AVG(laps) FROM table_name_6 WHERE grid < 21 AND driver = "renzo zorzi"