user: Question: What is the average Yards with an average of less than 4 and the long is 12 with less than 29 attempts?
Columns: ['Player', 'Attempts', 'Yards', 'Average', 'Long', 'Touchdowns']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Stephen Davis', 332.0, 1318.0, 4.0, 50.0, 11.0]
SQL:

assistant: SELECT AVG("Yards") FROM "Table" WHERE "Average" < 4.0 AND "Long" = 12.0 AND "Attempts" < 29.0;