user: Question: Position of defensive tackle, and a Round of 4, and a Pick # smaller than 36 has what overall average?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 27.0, 27.0, 'Donald Brown', 'Running Back', 'Connecticut']
SQL:

assistant: SELECT AVG("Overall") FROM "Table" WHERE "Position" = 'defensive tackle' AND "Round" = 4.0 AND "Pick #" < 36.0;