What is the average grid for Clay Regazzoni?
CREATE TABLE table_name_29 (grid INTEGER, driver VARCHAR)
SELECT AVG(grid) FROM table_name_29 WHERE driver = "clay regazzoni"
### Context: CREATE TABLE table_name_29 (grid INTEGER, driver VARCHAR) ### Question: What is the average grid for Clay Regazzoni? ### Answer: SELECT AVG(grid) FROM table_name_29 WHERE driver = "clay regazzoni"