user: Question: What is the average number of field goals scored by a right halfback who had more than 3 touchdowns?
Columns: ['Player', 'Position', 'Starter', 'Touchdowns', 'Extra points', 'Field goals', 'Points']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Tom Hammond', 'Fullback', 'yes', 3.0, 8.0, 0.0, 23.0]
SQL:

assistant: SELECT AVG("Field goals") FROM "Table" WHERE "Position" = 'right halfback' AND "Touchdowns" > 3.0;